Update actions/cache action to v5 (#461)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/update-l10n-sources.yml

@@ -19,7 +19,7 @@ jobs:
           python-version: "3.13"
 
       - name: Restore pip cache 💾
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}

.github/workflows/update-l10n.yml

@@ -19,7 +19,7 @@ jobs:
           python-version: "3.13"
 
       - name: Restore pip cache 💾
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}