Merge pull request #10673 from Icinga/backport-10670-to-support/2.14

[Backport support/2.14] Bump actions/cache from 4 to 5

Author: yhabteab

.github/workflows/linux.yml

@@ -69,7 +69,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Restore/backup ccache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ccache
           key: ccache/${{ matrix.distro }}