Use v4 of the checkout action. v3 will be deprecated.

.github/workflows/molecule.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: ansible-lint
         uses: ansible-community/ansible-lint-action@main
   test:
@@ -59,7 +59,7 @@ jobs:
             tag: "bionic"
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: "${{ github.repository }}"
       # - name: disable apparmor for mysql

.github/workflows/requirements2png.yml

@@ -15,7 +15,7 @@ jobs:
       contents: write
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: ${{ github.repository }}
       - name: create png

.github/workflows/todo.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: "ubuntu-20.04"
     steps:
-      - uses: "actions/checkout@master"
+      - uses: actions/checkout@v4
       - name: "TODO to Issue"
         uses: "alstr/todo-to-issue-action@v2.3"
         id: "todo"