Bump com.google.auth:google-auth-library-oauth2-http (#6656)

Bumps com.google.auth:google-auth-library-oauth2-http from 1.37.1 to 1.38.0.

---
updated-dependencies:
- dependency-name: com.google.auth:google-auth-library-oauth2-http
  dependency-version: 1.38.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -107,7 +107,7 @@ felixScr = "org.apache.felix:org.apache.felix.scr:2.2.12"
 gmetric4j = { module = "info.ganglia.gmetric4j:gmetric4j", version.ref = "gmetric4j" }
 googleCloudLibrariesBom = { module = "com.google.cloud:libraries-bom", version = "26.66.0" }
 googleCloudMonitoring = { module = "com.google.cloud:google-cloud-monitoring", version.ref = "google-cloud-monitoring" }
-googleOauth2Http = { module = "com.google.auth:google-auth-library-oauth2-http", version = "1.37.1"}
+googleOauth2Http = { module = "com.google.auth:google-auth-library-oauth2-http", version = "1.38.0"}
 grpcApi = { module = "io.grpc:grpc-api", version.ref = "grpc" }
 grpcCore = { module = "io.grpc:grpc-core", version.ref = "grpc" }
 grpcInprocess = { module = "io.grpc:grpc-inprocess", version.ref = "grpc" }