CI: Bump the github-actions group across 3 directories with 2 updates

Bumps the github-actions group with 1 update in the / directory: [actions/upload-artifact](https://github.com/actions/upload-artifact).
Bumps the github-actions group with 1 update in the /.github/actions/test_macvim_artifacts directory: [actions/upload-artifact](https://github.com/actions/upload-artifact).
Bumps the github-actions group with 1 update in the /.github/actions/universal-package directory: [actions/cache](https://github.com/actions/cache).


Updates `actions/upload-artifact` from 6 to 7
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

Updates `actions/upload-artifact` from 4 to 7
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

Updates `actions/cache` from 4 to 5
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/actions/test_macvim_artifacts/action.yml

@@ -13,7 +13,7 @@ runs:
   using: "composite"
   steps:
     - name: Upload failed tests
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         # Name of the artifact to upload.
         name: ${{ format('GH-{0}-{1}-{2}-{3}-{4}-failed-macvim-tests',

.github/actions/universal-package/action.yml

@@ -76,7 +76,7 @@ runs:
 
     - name: Restore keg cache
       id: cache-keg-restore
-      uses: actions/cache/restore@v4
+      uses: actions/cache/restore@v5
       with:
         path: ${{ steps.setup-formula.outputs.brew_prefix }}/Cellar/${{ inputs.formula }}
         key: ${{ inputs.formula }}-homebrew-cache-custom-unified-prefix${{ steps.setup-formula.outputs.brew_prefix }}-xcode${{ steps.setup-formula.outputs.xcode_version }}-${{ hashFiles(format('{0}.rb', inputs.formula)) }}
@@ -120,7 +120,7 @@ runs:
 
     - name: Save keg cache
       id: cache-keg-save
-      uses: actions/cache/save@v4
+      uses: actions/cache/save@v5
       # We always save the generated artifact even if the whole run
       # fails due to other issues. This helps debugging build
       # failure issues faster if the cache doesn't already exist as

.github/workflows/macvim-buildtest.yaml

@@ -435,7 +435,7 @@ jobs:
       # and add pictures to make them look nice. 
       - name: Upload MacVim image
         if: inputs.publish && (startsWith(github.ref, 'refs/tags/') || github.ref == 'refs/heads/master')
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: MacVim${{ inputs.publish_postfix  }}.dmg
           path: src/MacVim/build/Release/MacVim${{ inputs.publish_postfix }}.dmg