deps: update dependency com.google.cloud:google-cloud-core to v2.8.13 (…

…#1083)

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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) | `2.8.12` -> `2.8.13` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.13/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.13/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.13/compatibility-slim/2.8.12)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.13/confidence-slim/2.8.12)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.8.13`](https://togithub.com/googleapis/java-core/blob/HEAD/CHANGELOG.md#&#8203;2813-httpsgithubcomgoogleapisjava-corecomparev2812v2813-2022-09-20)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v2.8.12...v2.8.13)

##### Dependencies

-   Update dependency io.grpc:grpc-bom to v1.49.1 ([#&#8203;919](https://togithub.com/googleapis/java-core/issues/919)) ([2d481ba](https://togithub.com/googleapis/java-core/commit/2d481ba500e247d8fee49abe30a9eb84bdcc8d07))

</details>

---

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samples/install-without-bom/pom.xml

@@ -52,7 +52,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.12</version>
+      <version>2.8.13</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>

samples/snapshot/pom.xml

@@ -52,7 +52,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.12</version>
+      <version>2.8.13</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>

samples/snippets/pom.xml

@@ -62,7 +62,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.12</version>
+      <version>2.8.13</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>