Bump actions/cache from 1 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 1 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v1...v4)

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

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

.github/workflows/check-release.yml

@@ -25,7 +25,7 @@ jobs:
         run: |
           echo "::set-output name=dir::$(pip cache dir)"
       - name: Cache pip
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
           key: ${{ runner.os }}-pip-${{ hashFiles('setup.cfg') }}
@@ -34,7 +34,7 @@ jobs:
             ${{ runner.os }}-pip-
       - name: Cache checked links
         if: ${{ matrix.group == 'link_check' }}
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pytest-link-check
           key: ${{ runner.os }}-linkcheck-${{ hashFiles('**/*.md', '**/*.rst') }}-md-links

.github/workflows/docs.yml

@@ -28,7 +28,7 @@ jobs:
       run: |
         echo "::set-output name=dir::$(pip cache dir)"
     - name: Cache pip
-      uses: actions/cache@v1
+      uses: actions/cache@v4
       with:
         path: ${{ steps.pip-cache.outputs.dir }}
         key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('setup.py') }}

.github/workflows/js.yml

@@ -29,7 +29,7 @@ jobs:
           node-version: '12.x'
 
       - name: Cache node modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-node-modules
         with:
@@ -42,7 +42,7 @@ jobs:
             ${{ runner.os }}-
 
       - name: Cache pip on Linux
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         if: startsWith(runner.os, 'Linux')
         with:
           path: ~/.cache/pip