Bump the actions group with 1 update

Bumps the actions group with 1 update: [actions/cache](https://github.com/actions/cache).


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)

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

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

Author: dependabot[bot]

.github/workflows/cygwin.yml

@@ -139,22 +139,22 @@ jobs:
         # FreeType build fails with bash, succeeds with dash
 
       - name: Cache pip
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: C:\cygwin\home\runneradmin\.cache\pip
           key: Cygwin-py3.${{ matrix.python-minor-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
           restore-keys: |
             ${{ matrix.os }}-py3.${{ matrix.python-minor-version }}-pip-
 
       - name: Cache ccache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: C:\cygwin\home\runneradmin\.ccache
           key: Cygwin-py3.${{ matrix.python-minor-version }}-ccache-${{ hashFiles('src/*') }}
           restore-keys: Cygwin-py3.${{ matrix.python-minor-version }}-ccache-
 
       - name: Cache Matplotlib
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             C:\cygwin\home\runneradmin\.cache\matplotlib

.github/workflows/tests.yml

@@ -162,31 +162,31 @@ jobs:
           esac
 
       - name: Cache pip
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         if: startsWith(runner.os, 'Linux')
         with:
           path: ~/.cache/pip
           key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-pip-
       - name: Cache pip
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         if: startsWith(runner.os, 'macOS')
         with:
           path: ~/Library/Caches/pip
           key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-pip-
       - name: Cache ccache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.ccache
           key: ${{ matrix.os }}-py${{ matrix.python-version }}-ccache-${{ hashFiles('src/*') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-ccache-
       - name: Cache Matplotlib
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/matplotlib