Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

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

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

.github/workflows/deploy.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/manual_new_rdp.yml

@@ -31,7 +31,7 @@ jobs:
           echo "::set-output name=date-fr-long::$(date -d ${{ github.event.inputs.date }} '+%-d %B %Y')"
 
       - name: Get source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Create a new GeoRDP
         shell: bash

.github/workflows/pr_checker_build.yml

@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v3

.github/workflows/pr_cleaner_post_merge.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Get source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Prepare redirection
         run: |