deps: update google.core.version to v2.8.23 (#885)

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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) | `2.8.22` -> `2.8.23` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.23/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.23/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.23/compatibility-slim/2.8.22)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.23/confidence-slim/2.8.22)](https://docs.renovatebot.com/merge-confidence/) |
| [com.google.cloud:google-cloud-core-bom](https://togithub.com/googleapis/java-core) | `2.8.22` -> `2.8.23` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/2.8.23/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/2.8.23/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/2.8.23/compatibility-slim/2.8.22)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core-bom/2.8.23/confidence-slim/2.8.22)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v2.8.23`](https://togithub.com/googleapis/java-core/blob/HEAD/CHANGELOG.md#&#8203;2823-httpsgithubcomgoogleapisjava-corecomparev2822v2823-2022-10-24)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v2.8.22...v2.8.23)

##### Dependencies

-   Update dependency io.grpc:grpc-bom to v1.50.2 ([#&#8203;990](https://togithub.com/googleapis/java-core/issues/990)) ([42b1081](https://togithub.com/googleapis/java-core/commit/42b108100173041925cc705f596f388bab26d954))
-   Update dependency org.easymock:easymock to v5 ([#&#8203;980](https://togithub.com/googleapis/java-core/issues/980)) ([64be350](https://togithub.com/googleapis/java-core/commit/64be350d3713af1a95ca51997194a15c7292f7ae))

</details>

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Diff for: first-party-dependencies/pom.xml

@@ -63,7 +63,7 @@
     <protobuf.version>3.21.8</protobuf.version>
     <google.api-common.version>2.2.1</google.api-common.version>
     <google.common-protos.version>2.9.6</google.common-protos.version>
-    <google.core.version>2.8.22</google.core.version>
+    <google.core.version>2.8.23</google.core.version>
     <google.auth.version>1.12.1</google.auth.version>
     <google.http-client.version>1.42.2</google.http-client.version>
     <google.oauth-client.version>1.34.1</google.oauth-client.version>