Bump com.google.auth:google-auth-library-oauth2-http (#27)

Bumps com.google.auth:google-auth-library-oauth2-http from 1.20.0 to 1.21.0.

---
updated-dependencies:
- dependency-name: com.google.auth:google-auth-library-oauth2-http
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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pom.xml

@@ -87,7 +87,7 @@
     <google-api-client.version>2.2.0</google-api-client.version>
     <google-oauth-client.version>1.34.1</google-oauth-client.version>
     <google-api-services.version>1.25.0</google-api-services.version>
-    <google-auth-library-oauth2-http.version>1.20.0</google-auth-library-oauth2-http.version>
+    <google-auth-library-oauth2-http.version>1.21.0</google-auth-library-oauth2-http.version>
     <jackson.version>2.16.1</jackson.version>
 
     <spring-boot.version>2.6.15</spring-boot.version>