ci: bump action versions

Author: Hisham Muhammad

.github/workflows/bit32-multi-arch-tests.yml

@@ -14,8 +14,8 @@ jobs:
         luaRocksVersion: ["3.3.1"]
         arch: ["armv7", "aarch64"]
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/checkout@v6
+      - uses: actions/cache@v4
         id: lua-cache
         with:
           path: .install/${{ matrix.arch }}/lua-${{ matrix.luaVersion }}

.github/workflows/compat53-tests.yml

@@ -44,7 +44,7 @@ jobs:
             compiler: g++
             external: true
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - name: install Lua
         run: |
           sudo apt install libreadline-dev