Change Github Action to use 1.18 go env

Check if this helps with CodeQL action issues

.github/workflows/default.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.21
+          go-version: ^1.18
 
       - name: Build
         run: go build -v ./...