Disable Go cache

Avoid warning from lack of `go.sum` file.

Author: martincostello

.github/workflows/oats.yml

@@ -63,6 +63,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
         with:
+          cache: false
           go-version: '1.24'
 
       - name: Install OATS