Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/documentation.yml

@@ -36,7 +36,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4

.github/workflows/linter.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4

.github/workflows/packager.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install system requirements
         run: |
@@ -51,7 +51,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4
@@ -103,7 +103,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4

.github/workflows/tester.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4
@@ -54,7 +54,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Print QGIS version
         run: qgis --version