Bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/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](https://github.com/actions/cache/compare/v3...v4)

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

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

.github/workflows/benches.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           components: rust-src
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry

.github/workflows/ci.yml

@@ -407,7 +407,7 @@ jobs:
         with:
           node-version: 14
       - run: python -m pip install --upgrade pip && pip install nox
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         id: cache
         with:
           path: |

.github/workflows/gh-pages.yml

@@ -63,7 +63,7 @@ jobs:
       - uses: actions/setup-python@v5
       - uses: dtolnay/rust-toolchain@stable
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
@@ -82,7 +82,7 @@ jobs:
 
       # Download previous benchmark result from cache (if exists)
       - name: Download previous benchmark data
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ./cache
           key: ${{ runner.os }}-benchmark
@@ -110,7 +110,7 @@ jobs:
       - uses: actions/setup-python@v5
       - uses: dtolnay/rust-toolchain@stable
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
@@ -120,7 +120,7 @@ jobs:
         continue-on-error: true
 
       - name: Download previous benchmark data
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ./cache
           key: ${{ runner.os }}-pytest-benchmark