.github: use minimum required go version for Lint job

To avoid warnings related to the latest Go versions.

Signed-off-by: Anna Shaleva <[email protected]>

.github/workflows/go.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.19'
       - uses: actions/checkout@v3
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3