chore(deps): update dependency google-cloud-documentai to v1 (#185)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-documentai](https://togithub.com/googleapis/python-documentai) | `==0.5.0` -> `==1.0.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-documentai/1.0.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-documentai/1.0.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-documentai/1.0.0/compatibility-slim/0.5.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-documentai/1.0.0/confidence-slim/0.5.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/python-documentai</summary>

### [`v1.0.0`](https://togithub.com/googleapis/python-documentai/blob/master/CHANGELOG.md#&#8203;100-httpswwwgithubcomgoogleapispython-documentaicomparev050v100-2021-07-26)

[Compare Source](https://togithub.com/googleapis/python-documentai/compare/v0.5.0...v1.0.0)

##### Features

-   add always_use_jwt_access ([35e3b74](https://www.github.com/googleapis/python-documentai/commit/35e3b74474719ef22449fbcb4772e6d381e80874))
-   add the processor management methods ([35e3b74](https://www.github.com/googleapis/python-documentai/commit/35e3b74474719ef22449fbcb4772e6d381e80874))
-   bump release level to production/stable ([#&#8203;151](https://www.github.com/googleapis/python-documentai/issues/151)) ([1e6b470](https://www.github.com/googleapis/python-documentai/commit/1e6b470673c4ff71f0f49c11825cb408d1929a88))
-   Move CommonOperationMetadata for potential reuse ([#&#8203;157](https://www.github.com/googleapis/python-documentai/issues/157)) ([a1a92b2](https://www.github.com/googleapis/python-documentai/commit/a1a92b20cc6afa80434a00a90690f1470ed48353))
-   update ReviewDocumentRequest to allow set priority and enable validation ([#&#8203;172](https://www.github.com/googleapis/python-documentai/issues/172)) ([35e3b74](https://www.github.com/googleapis/python-documentai/commit/35e3b74474719ef22449fbcb4772e6d381e80874))
-   **v1beta3:** update document.proto, add the processor management methods ([#&#8203;160](https://www.github.com/googleapis/python-documentai/issues/160)) ([54bc0e9](https://www.github.com/googleapis/python-documentai/commit/54bc0e9c70046bb411dafd53d98c501676585aaf))
-   **v1:** Move CommonOperationMetadata into a separate file for potential reuse ([#&#8203;158](https://www.github.com/googleapis/python-documentai/issues/158)) ([c309f8f](https://www.github.com/googleapis/python-documentai/commit/c309f8f6f88e0308677fc68a7825b3eac7b57627))

##### Bug Fixes

-   **deps:** add packaging requirement ([#&#8203;162](https://www.github.com/googleapis/python-documentai/issues/162)) ([f09f807](https://www.github.com/googleapis/python-documentai/commit/f09f8075a3b76fe0d226afa955dae170117df0d0))
-   **deps:** pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions ([#&#8203;180](https://www.github.com/googleapis/python-documentai/issues/180)) ([8eab36e](https://www.github.com/googleapis/python-documentai/commit/8eab36e8ff8616ccfdfd4c4149265030bab45d19))
-   disable always_use_jwt_access ([35e3b74](https://www.github.com/googleapis/python-documentai/commit/35e3b74474719ef22449fbcb4772e6d381e80874))
-   enable self signed jwt for grpc ([#&#8203;184](https://www.github.com/googleapis/python-documentai/issues/184)) ([1e35b42](https://www.github.com/googleapis/python-documentai/commit/1e35b42739f36d7e1f19528299dac40de5b0cca4))
-   exclude docs and tests from package ([#&#8203;159](https://www.github.com/googleapis/python-documentai/issues/159)) ([1325677](https://www.github.com/googleapis/python-documentai/commit/132567742a2a9927665ed46278952815088ccafc))

##### Documentation

-   omit mention of Python 2.7 in 'CONTRIBUTING.rst' ([#&#8203;1127](https://www.github.com/googleapis/python-documentai/issues/1127)) ([#&#8203;164](https://www.github.com/googleapis/python-documentai/issues/164)) ([baba888](https://www.github.com/googleapis/python-documentai/commit/baba888184d6cc872e048aefd52b14d2486c553f))
-   add Samples section to CONTRIBUTING.rst ([#&#8203;181](https://www.github.com/googleapis/python-documentai/issues/181)) ([b0f4c7a](https://www.github.com/googleapis/python-documentai/commit/b0f4c7ab32d7b864eade29e44efc1b51c80fb3e1))

</details>

---

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document_ai/snippets/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-documentai==0.5.0
+google-cloud-documentai==1.0.0
 google-cloud-storage==1.41.1