Update actions/checkout action to v6.0.3

Author: renovate[bot]

.github/workflows/appimage.yml

@@ -23,7 +23,7 @@ jobs:
             arch: aarch64
     container: ghcr.io/pkgforge-dev/archlinux:latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - name: Preparing Container
         uses: pkgforge-dev/anylinux-setup-action@0964f2258d6c93d1391359978dde081fd8b3c6af # v2
       - name: Install Dependencies