fix ci

Author: FZambia

.github/workflows/ci.yaml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         sdk: [3.4, stable, beta] # note, not testing on 3.3 due to build_runner CI dependency problem.
-        protobuf: ["3.1.0", "4.1.0"] # Test latest v3 and latest v4
+        protobuf: ["3.1.0", "4.0.0"] # make sure works with both protobuf versions.
     steps:
       - uses: actions/checkout@v4