build(deps): update dependency com.google.cloud:google-cloud-shared-config to v1.2.7 (#460)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-shared-config](https://togithub.com/googleapis/java-shared-config) | `1.2.6` -> `1.2.7` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-config/1.2.7/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-config/1.2.7/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-config/1.2.7/compatibility-slim/1.2.6)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-config/1.2.7/confidence-slim/1.2.6)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-shared-config</summary>

### [`v1.2.7`](https://togithub.com/googleapis/java-shared-config/blob/HEAD/CHANGELOG.md#&#8203;127-httpsgithubcomgoogleapisjava-shared-configcomparev126v127-2022-02-04)

[Compare Source](https://togithub.com/googleapis/java-shared-config/compare/v1.2.6...v1.2.7)

</details>

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Author: renovate-bot

pom.xml

@@ -16,7 +16,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>1.2.6</version>
+    <version>1.2.7</version>
   </parent>
   <developers>
     <developer>