fix(ci): pin + cache

.github/workflows/lint.yml

@@ -22,7 +22,14 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           cache: 'pip' # caching pip dependencies
-
+      
+      - name: Cache pip
+        uses: actions/cache@9b0c1fce7a93df8e3bb8926b0d6e9d89e92f20a7 # 3.0.11
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
 
       - name: Install dependencies
         run: |

.github/workflows/test.yml

@@ -35,7 +35,7 @@ jobs:
           EOF
 
       - name: Cache Vagrant boxes
-        uses: actions/cache@2541b1294d2704b0964813337f33b291d3f8596b # 3.0.11
+        uses: actions/cache@9b0c1fce7a93df8e3bb8926b0d6e9d89e92f20a7 # 3.0.11
         with:
           path: |
             ~/.vagrant.d/boxes