Bump actions/checkout from 2 to 3.1.0 (#449)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.1.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3.1.0)

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

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/linting_testing.yml

@@ -43,7 +43,7 @@ jobs:
       # check-out repo and set-up python
       #----------------------------------------------
       - name: Check out repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up python
         uses: actions/setup-python@v4
         with:

.github/workflows/review-app-creation.yml

@@ -29,7 +29,7 @@ jobs:
 
     steps:
     - name: 📥 Checkout to the PR branch
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         ref: ${{ github.head_ref }}
 
@@ -100,7 +100,7 @@ jobs:
 
     steps:
     - name: 📥 Checkout to the PR branch
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         ref: ${{ github.head_ref }}
 

.github/workflows/review-app-removal.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
     - name: 📥 Checkout to the PR branch
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: 🏷 Set review app name
       run: