Update actions/checkout action to v4

.github/workflows/_test-negative.yml

@@ -20,7 +20,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/auto-readme.yml

@@ -24,7 +24,7 @@ jobs:
   update:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Find default branch name
         id: defaultBranch

.github/workflows/test-matrix-2-levels.yml

@@ -20,7 +20,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: add mock atmos to the path
         run: echo "./tests/fixtures" >> $GITHUB_PATH

.github/workflows/test-matrix-3-levels.yml

@@ -20,7 +20,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: add mock atmos to the path
         run: echo "./tests/fixtures" >> $GITHUB_PATH

.github/workflows/test-no-changes.yml

@@ -20,7 +20,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/test-positive.yml

@@ -20,7 +20,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: add mock atmos to the path
         run: echo "./tests/fixtures" >> $GITHUB_PATH

action.yml

@@ -62,7 +62,7 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         ref: ${{ inputs.head-ref }}
 
@@ -94,7 +94,7 @@ runs:
     # atmos describe affected requires the main branch of the git repo to be present on disk so it can compare the
     # current branch to it to determine the affected stacks. This is different from a file-based git diff in that we
     # look at the contents of the stack files to determine if any have changed.
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         ref: ${{ inputs.default-branch }}
         path: main-branch