build(deps): Bump com.google.api-client:google-api-client-gson

Bumps [com.google.api-client:google-api-client-gson](https://github.com/googleapis/google-api-java-client) from 2.7.0 to 2.8.1.
- [Release notes](https://github.com/googleapis/google-api-java-client/releases)
- [Changelog](https://github.com/googleapis/google-api-java-client/blob/main/CHANGELOG.md)
- [Commits](googleapis/google-api-java-client@v2.7.0...v2.8.1)

---
updated-dependencies:
- dependency-name: com.google.api-client:google-api-client-gson
  dependency-version: 2.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

plugin-camel-google-calendar/build.gradle

@@ -17,7 +17,7 @@ dependencies {
     implementation("org.apache.camel:camel-core:4.8.1")
     implementation("com.google.oauth-client:google-oauth-client-jetty:1.36.0")
     implementation("com.google.apis:google-api-services-calendar:v3-rev411-1.25.0")
-    implementation("com.google.api-client:google-api-client-gson:2.7.0")
+    implementation("com.google.api-client:google-api-client-gson:2.8.1")
     implementation project(':plugin-camel')
 
     testImplementation project(':plugin-camel').sourceSets.test.output