Bump the github-actions group with 4 updates (pypsa-meets-earth#1188)

Bumps the github-actions group with 4 updates: [actions/checkout](https://github.com/actions/checkout), [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba), [actions/cache](https://github.com/actions/cache) and [akhilmhdh/contributors-readme-action](https://github.com/akhilmhdh/contributors-readme-action).


Updates `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)

Updates `mamba-org/setup-micromamba` from 1 to 2
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v1...v2)

Updates `actions/cache` from 3 to 4
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

Updates `akhilmhdh/contributors-readme-action` from 2.3.6 to 2.3.10
- [Release notes](https://github.com/akhilmhdh/contributors-readme-action/releases)
- [Commits](akhilmhdh/contributors-readme-action@v2.3.6...v2.3.10)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: mamba-org/setup-micromamba
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: akhilmhdh/contributors-readme-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

.github/workflows/ci.yml

@@ -31,11 +31,11 @@ jobs:
         shell: bash -l {0}
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
 
     - name: Setup micromamba
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v2
       with:
         micromamba-version: '1.5.9-1'
         environment-file: envs/environment.yaml
@@ -50,7 +50,7 @@ jobs:
         echo "WEEK=$(date +'%Y%U')" >> $GITHUB_ENV
 
     - name: Cache data and cutouts folders
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           data

.github/workflows/main.yml

@@ -9,6 +9,6 @@ jobs:
     name: A job to automate contrib in readme
     steps:
     - name: Contribute List
-      uses: akhilmhdh/[email protected].6
+      uses: akhilmhdh/[email protected].10
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}