Update instrumentation/grpc/lib/opentelemetry/instrumentation/grpc/patches/client_stub.rb

Co-authored-by: Kayla Reopelle <[email protected]>

Author: michal-kazmierczak

instrumentation/grpc/lib/opentelemetry/instrumentation/grpc/patches/client_stub.rb

@@ -8,7 +8,7 @@ module OpenTelemetry
   module Instrumentation
     module Grpc
       module Patches
-        # Module to be prepended to force GRPC to use the client interceptor by
+        # Module to be prepended to force gRPC to use the client interceptor by
         # default so the user doesn't have to manually add it when initializing a client.
         module ClientStub
           def initialize(host, creds, **args)