chore(deps): update github actions (major)

.github/workflows/build-and-test.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
       - name: Install dependencies
         run: python3 -m pip install tox
       - name: Run linters
@@ -20,15 +20,15 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
       - name: Install dependencies
         run: python -m pip install tox
       - name: Run tests
         run: tox -e unit
 
   integration-test:
     name: Integration tests
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs:
       - lint
       - unit-test
@@ -41,7 +41,7 @@ jobs:
           - "2.9.44"  # renovate: latest juju 2
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
       - name: Set channel
         run: |
           juju_channel=$(echo "${{ matrix.agent-versions }}" | cut -c 1-3)

.github/workflows/renovate.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@8f6b0f762415909f60b0efb1817c4dee029ea806 # v40.1.1