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] <support@github.com>

Author: dependabot[bot]

.github/workflows/core.yml

@@ -34,7 +34,7 @@ jobs:
           pip install -r ./CMSIS/Core/Test/requirements.txt
 
       - name: Cache vcpkg
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           key: vcpkg-${{ runner.os }}-${{ runner.arch }}-${{ github.run_id }}-${{ matrix.compiler }}
           restore-keys: |

.github/workflows/corevalidation.yml

@@ -57,7 +57,7 @@ jobs:
           pip install -r ./CMSIS/CoreValidation/Project/requirements.txt
 
       - name: Cache vcpkg
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           key: vcpkg-${{ runner.os }}-${{ runner.arch }}-${{ github.run_id }}-${{ matrix.compiler }}
           restore-keys: |