fix(deps): update protobufversion to v3.21.8

renovate[bot] · augi · commit 170206ed63bd · 2022-10-19T10:09:10.000+02:00
diff --git a/build.gradle b/build.gradle
@@ -12,7 +12,7 @@ allprojects {
 
 ext {
     grpcVersion = '1.50.1'
-    protobufVersion = '3.21.7'
+    protobufVersion = '3.21.8'
 }
 
 nexusPublishing {
