fix(deps): update dependency com.google.googlejavaformat:google-java-format to v1.21.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -109,7 +109,7 @@ google-auto-value-ap = { module = "com.google.auto.value:auto-value", version =
 google-auto-service-annotations = { module = "com.google.auto.service:auto-service-annotations", version = "1.1.1" }
 google-auto-service = { module = "com.google.auto.service:auto-service", version = "1.1.1" }
 google-protobuf = { module = "com.google.protobuf:protobuf-java", version = "3.25.3" }
-google-java-format = { module = "com.google.googlejavaformat:google-java-format", version = "1.20.0" }
+google-java-format = { module = "com.google.googlejavaformat:google-java-format", version = "1.21.0" }
 google-flexbox = { module = "com.google.android.flexbox:flexbox", version = "3.0.0" }
 
 # AAPT2