fix(ci): pin + cache

.github/workflows/test.yml

@@ -35,7 +35,7 @@ jobs:
           EOF
 
       - name: Cache Vagrant boxes
-        uses: actions/cache@fd5de65bc895cf536527842281bea11763fefd77 # 3.0.8
+        uses: actions/cache@2541b1294d2704b0964813337f33b291d3f8596b # 3.0.11
         with:
           path: |
             ~/.vagrant.d/boxes