Bump actions/cache from 5.0.5 to 6.1.0

Bumps [actions/cache](https://github.com/actions/cache) from 5.0.5 to 6.1.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@27d5ce7...55cc834)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/buildmgr.yml

@@ -387,7 +387,7 @@ jobs:
           submodules: true
 
       - name: Cache ARM GCC
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           key: "${{ matrix.arm_gcc_install_base }}/${{ matrix.installer_name }}"
           path: ${{ matrix.installer_name }}
@@ -410,7 +410,7 @@ jobs:
           unzip -o $Env:installer_name
 
       - name: Cache CMSIS Pack
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         env:
           CACHE_NAME: cmsis_pack
         with:
@@ -540,7 +540,7 @@ jobs:
         run: mkdir build
 
       - name: Cache ARM GCC
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           key: "${{ env.arm_gcc_install_base }}/${{ env.installer_name }}"
           path: ${{ env.installer_name }}
@@ -551,7 +551,7 @@ jobs:
           tar -xvf ${{ env.installer_name }}
 
       - name: Cache CMSIS Pack
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         env:
           CACHE_NAME: cmsis_pack
         with: