ci(tests): actions/cache@v4

See also: https://github.com/actions/cache/releases/tag/v4.0.0

Author: tony

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
 
       - name: Setup tmux build cache for tmux ${{ matrix.tmux-version }}
         id: tmux-build-cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/tmux-builds/tmux-${{ matrix.tmux-version }}
           key: tmux-${{ matrix.tmux-version }}