ci: change integration tests to use the stable go version

The stable Go version should be used to avoid keeping updating the
workflow config when a new patch version is released. This is to make
sure that Go doesn't try to download a new toolchain version.

.github/workflows/test-integration.yml

@@ -55,7 +55,7 @@ jobs:
       - uses: actions/setup-go@v4
         if: env.GIT_DIFF
         with:
-          go-version-file: go.mod
+          go-version: 'stable'
 
       - name: Run Integration Tests
         if: env.GIT_DIFF