chore(deps): update dependency com.google.cloud:google-cloud-logging-logback to v0.127.4-alpha (#820)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-logging-logback](https://togithub.com/googleapis/java-logging-logback) | `0.127.3-alpha` -> `0.127.4-alpha` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-logging-logback/0.127.4-alpha/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-logging-logback/0.127.4-alpha/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-logging-logback/0.127.4-alpha/compatibility-slim/0.127.3-alpha)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-logging-logback/0.127.4-alpha/confidence-slim/0.127.3-alpha)](https://docs.renovatebot.com/merge-confidence/) |

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samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-logging-logback</artifactId>
-      <version>0.127.3-alpha</version>
+      <version>0.127.4-alpha</version>
     </dependency>
     <!-- [END logging-logback_install_without_bom] -->