fix(ci): add GOTOOLCHAIN=auto to gosec and govulncheck steps

.gitea/workflows/prepare-release.yml

@@ -50,11 +50,15 @@ jobs:
 
       - name: Run gosec security analysis
         uses: securego/gosec@v2.22.4
+        env:
+          GOTOOLCHAIN: auto
         with:
           args: ./...
 
       - name: Run govulncheck
         uses: golang/govulncheck-action@v1.0.4
+        env:
+          GOTOOLCHAIN: auto
         with:
           go-package: ./...
           cache: true