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](actions/cache@v3...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/pip.yml

@@ -75,7 +75,7 @@ jobs:
 
     - name: Restore Conan cache
       id: cache-conan
-      uses: actions/cache/restore@v3
+      uses: actions/cache/restore@v4
       with:
         key: conan-${{ steps.cache-key.outputs.conan-key }}
         path: ${{ env.CONAN_HOME }}
@@ -84,7 +84,7 @@ jobs:
       run: pip install --verbose '.[test]'
 
     - name: Save Conan cache
-      uses: actions/cache/save@v3
+      uses: actions/cache/save@v4
       if: steps.cache-conan.outputs.cache-hit != 'true'
       with:
         key: conan-${{ steps.cache-key.outputs.conan-key }}

.github/workflows/wheels.yml

@@ -124,7 +124,7 @@ jobs:
 
       - name: Restore Conan cache
         id: cache-conan
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ steps.cache-key.outputs.conan-key }}
           path: ${{ env.CONAN_HOME }}
@@ -135,7 +135,7 @@ jobs:
         run: pip wheel . -vv --no-deps
 
       - name: Save Conan cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-conan.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-key.outputs.conan-key }}
@@ -189,7 +189,7 @@ jobs:
 
       - name: Restore Conan cache
         id: cache-conan
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ steps.cache-key.outputs.conan-key }}
           path: ${{ env.CONAN_HOME }}
@@ -198,7 +198,7 @@ jobs:
         run: pip wheel . -vv --no-deps
 
       - name: Save Conan cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: steps.cache-conan.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-key.outputs.conan-key }}