Update install.rst

[ROCm/rdc commit: 3357346df7]

projects/rdc/docs/install/install.rst

@@ -64,7 +64,7 @@ gRPC and Protoc must be built from source as the prebuilt packages are not avail
 
    .. code-block:: shell
 
-    git clone -b v1.61.0 https://github.com/grpc/grpc --depth=1 --shallow-submodules --recurse-submodules
+    git clone -b v1.67.1 https://github.com/grpc/grpc --depth=1 --shallow-submodules --recurse-submodules
     cd grpc
     export GRPC_ROOT=/opt/grpc
     cmake -B build \