deps: update google.core.version to v1.94.4 (#305)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-core](https://togithub.com/googleapis/java-core) | `1.94.3` -> `1.94.4` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/compatibility-slim/1.94.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/confidence-slim/1.94.3)](https://docs.renovatebot.com/merge-confidence/) |
| [com.google.cloud:google-cloud-core-bom](https://togithub.com/googleapis/java-core) | `1.94.3` -> `1.94.4` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/1.94.4/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/1.94.4/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/1.94.4/compatibility-slim/1.94.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/1.94.4/confidence-slim/1.94.3)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-core</summary>

### [`v1.94.4`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1944-httpswwwgithubcomgoogleapisjava-corecomparev1943v1944-2021-03-11)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v1.94.3...v1.94.4)

</details>

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java-shared-dependencies/pom.xml

@@ -61,7 +61,7 @@
     <protobuf.version>3.15.5</protobuf.version>
     <google.api-common.version>1.10.1</google.api-common.version>
     <google.common-protos.version>2.1.0</google.common-protos.version>
-    <google.core.version>1.94.3</google.core.version>
+    <google.core.version>1.94.4</google.core.version>
     <google.auth.version>0.24.1</google.auth.version>
     <google.http-client.version>1.39.0</google.http-client.version>
     <google.api-client.version>1.31.3</google.api-client.version>