Fix failing build: update deprecated GitHub Actions to v4

Co-authored-by: WezSieTato <4258662+WezSieTato@users.noreply.github.com>
Agent-Logs-Url: https://github.com/WezSieTato/fastlane-plugin-mint/sessions/f7e5d571-ecd9-4dda-b8e6-db0c6cda642b

Author: Copilot

.github/workflows/example.yml

@@ -9,14 +9,14 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Cache bundler gems
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: vendor/bundle
         key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
         restore-keys: ${{ runner.os }}-gems-
     - name: Cache Mint packages
       id: mint-cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: /Users/runner/.mint
         key: ${{ runner.os }}-mint-${{ hashFiles('**/Mintfile') }}

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       with:
         path: vendor/bundle
         key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile') }}
@@ -23,9 +23,9 @@ jobs:
     - name: Run tests
       run: bundle exec rake
     - name: Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
     - name: Upload artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: test-results
         path: test-results