chore(deps): update actions/checkout action to v4

.github/workflows/delete-aws-volumes.yaml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Configure AWS Credentials
         env:

.github/workflows/deploy-aws.yaml

@@ -35,7 +35,7 @@ jobs:
     runs-on: ${{ needs.start-runner.outputs.label }} 
     steps:
     - name: Check out repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Setup operator environment
       # The runner will run the code as root. There is problem when using juju under root so here is small workaround to exec as ubuntu user

.github/workflows/deploy-eks.yaml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install tox
         run: |

.github/workflows/integrate.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Check libs
@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Check out code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Install dependencies
       run: sudo apt-get install python3-pip tox
@@ -42,7 +42,7 @@ jobs:
 
     steps:
     - name: Check out code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Install dependencies
       run: sudo apt-get install python3-pip tox
@@ -63,7 +63,7 @@ jobs:
         remove-android: 'true'
         remove-codeql: 'true'
         remove-docker-images: 'true'
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Setup operator environment
       uses: charmed-kubernetes/actions-operator@1.1.0
       with:

.github/workflows/release.yaml

@@ -16,7 +16,7 @@ jobs:
     name: Promote charm
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Release charm to channel
         uses: canonical/charming-actions/release-charm@2.3.0
         with: