deps: update dependency io.grpc:grpc-bom to v1.24.1

Author: renovate-bot

pom.xml

@@ -69,7 +69,7 @@
     <google.auth.version>0.18.0</google.auth.version>
     <google.http-client.version>1.32.1</google.http-client.version>
     <gax.version>1.49.1</gax.version>
-    <grpc.version>1.24.0</grpc.version>
+    <grpc.version>1.24.1</grpc.version>
     <protobuf.version>3.10.0</protobuf.version>
     <junit.version>4.12</junit.version>
     <easymock.version>3.6</easymock.version>