hotfix: use go 1.18.1 for release

Author: alexandrevilain

.github/workflows/release.yaml

@@ -7,13 +7,18 @@ on:
 
 env:
   REGISTRY: ghcr.io
+  GO_VERSION: 1.18.1
 
 jobs:
   release:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          check-latest: true
       - name: Generate operator hub bundle
         run: make bundle
       - name: Generate release artifacts