deps: update google http client dependencies to v1.47.1 (#3848)

Author: lqiu96

gapic-generator-java-pom-parent/pom.xml

@@ -28,7 +28,7 @@
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
     <grpc.version>1.71.0</grpc.version>
     <google.auth.version>1.37.1</google.auth.version>
-    <google.http-client.version>1.47.0</google.http-client.version>
+    <google.http-client.version>1.47.1</google.http-client.version>
     <gson.version>2.12.1</gson.version>
     <guava.version>33.4.0-jre</guava.version>
     <protobuf.version>3.25.8</protobuf.version>