Bump actions/checkout from 4 to 5

.github/workflows/cicd.yaml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       # Setup Python (faster than using Python container)
       - name: Setup Python
@@ -49,7 +49,7 @@ jobs:
   test-docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Test generating docs
         run: make docs
 
@@ -58,7 +58,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Python
         uses: actions/setup-python@v5

.github/workflows/deploy_mkdocs.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout main
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Python 3.11
         uses: actions/setup-python@v5

.github/workflows/publish.yml

@@ -10,7 +10,7 @@ jobs:
     name: release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python 3.x
         uses: actions/setup-python@v5