update(archlinux)

> error: gcc-libs: signature from "Frederik Schwan <frederik.schwan@linux.com>" is unknown trust
> :: File /var/cache/pacman/pkg/gcc-libs-15.2.1+r301+gf24307422d1d-1-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
> Do you want to delete it? [Y/n]

https://bbs.archlinux.org/viewtopic.php?id=304755

Author: jhheider

.github/workflows/pkg-platform.yml

@@ -115,6 +115,14 @@ jobs:
       PKGX_PANTRY_PATH: ${{ github.workspace }}
     steps:
       - uses: actions/checkout@v4
+      # need to update archlinux-keyring on run
+      # https://bbs.archlinux.org/viewtopic.php?id=304755
+      - run: |
+          if command -v pacman; then
+            pacman-key --init
+            pacman-key --populate archlinux
+            pacman -Sy --noconfirm archlinux-keyring
+          fi
       - uses: ./.github/actions/setup
       - uses: pkgxdev/setup@v2
         with: