Add v1.10.1 and v1.11.1 releases of grpc-go
diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index eb7eb12..c45a627 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -117,10 +117,10 @@
             'v1.9.2': None
         },
         {
-            'v1.10.0': None
+            'v1.10.1': None
         },
         {
-            'v1.11.0': None
+            'v1.11.1': None
         },
     ],
     'java': [