chore(deps): update dependency jsdoc-region-tag to v2 (#139)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [jsdoc-region-tag](https://togithub.com/googleapis/jsdoc-region-tag) | [`^1.0.6` -> `^2.0.0`](https://renovatebot.com/diffs/npm/jsdoc-region-tag/1.3.1/2.0.0) | [![age](https://badges.renovateapi.com/packages/npm/jsdoc-region-tag/2.0.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/jsdoc-region-tag/2.0.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/jsdoc-region-tag/2.0.0/compatibility-slim/1.3.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/jsdoc-region-tag/2.0.0/confidence-slim/1.3.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/jsdoc-region-tag</summary>

### [`v2.0.0`](https://togithub.com/googleapis/jsdoc-region-tag/blob/HEAD/CHANGELOG.md#&#8203;200-httpsgithubcomgoogleapisjsdoc-region-tagcomparev131v200-2022-05-20)

[Compare Source](https://togithub.com/googleapis/jsdoc-region-tag/compare/v1.3.1...v2.0.0)

##### ⚠ BREAKING CHANGES

-   update library to use Node 12 ([#&#8203;107](https://togithub.com/googleapis/jsdoc-region-tag/issues/107))

##### Build System

-   update library to use Node 12 ([#&#8203;107](https://togithub.com/googleapis/jsdoc-region-tag/issues/107)) ([5b51796](https://togithub.com/googleapis/jsdoc-region-tag/commit/5b51796771984cf8b978990025f14faa03c19923))

##### [1.3.1](https://www.github.com/googleapis/jsdoc-region-tag/compare/v1.3.0...v1.3.1) (2021-08-11)

##### Bug Fixes

-   **build:** migrate to using main branch ([#&#8203;79](https://www.togithub.com/googleapis/jsdoc-region-tag/issues/79)) ([5050615](https://www.github.com/googleapis/jsdoc-region-tag/commit/50506150b7758592df5e389c6a5c3d82b3b20881))

</details>

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packages/google-appengine/package.json

@@ -56,7 +56,7 @@
     "gts": "^3.1.0",
     "jsdoc": "^3.6.6",
     "jsdoc-fresh": "^2.0.0",
-    "jsdoc-region-tag": "^1.0.6",
+    "jsdoc-region-tag": "^2.0.0",
     "linkinator": "^2.13.6",
     "mocha": "^9.2.2",
     "null-loader": "^4.0.1",