Bump actions/checkout from 3 to 4

.github/workflows/aste_ci.yml

@@ -19,7 +19,7 @@ jobs:
       CXX_FLAGS: "-Werror -Wall -Wextra -Wno-unused-parameter"
       CTEST_OUTPUT_ON_FAILURE: "Yes"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: setup system
         run: |
           apt-get -y update && apt-get -y upgrade

.github/workflows/code_style.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout preCICE
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup python
         uses: actions/setup-python@v4
         with:

.github/workflows/link_check.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check links in markdown files (markdown-link-check)
         uses: gaurav-nelson/github-action-markdown-link-check@v1
         with:

.github/workflows/lint_markdown.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Lint markdown files (markdownlint)
         uses: articulate/actions-markdownlint@v1
         with: