Publish a fixed-name APK so the latest build has a permanent link

GitHub's /releases/latest/download/<name> redirect needs a file name
that stays put, and the release asset is named after its version. Each
production release now carries the same build twice: the versioned copy,
and a plain ProLibertateGames.apk, which makes this link permanent:

  .../releases/latest/download/ProLibertateGames.apk

Only the production channel gets one. /releases/latest skips
prereleases, which is exactly what stops a production install being
handed a dev build, so there is no equivalent dev link to offer.

The updater now picks its asset by name rather than taking the first
.apk it sees. Both copies are byte-identical, so nothing would have
broken either way, but relying on upload order for which file gets
installed is not something to leave lying around.

.github/workflows/release.yml

@@ -53,6 +53,11 @@ jobs:
           src="app/build/outputs/apk/debug/app-debug.apk"
           dest="ProLibertateGames-${version}.apk"
           cp "$src" "$dest"
+          # The same build again under a name that never changes. GitHub's
+          # /releases/latest/download/<name> redirect needs a constant file
+          # name, so this second copy is what makes a permanent download link
+          # possible — the versioned copy stays as the traceable one.
+          cp "$src" "ProLibertateGames.apk"
           echo "version=$version" >> "$GITHUB_OUTPUT"
           echo "apk=$dest" >> "$GITHUB_OUTPUT"
 
@@ -70,9 +75,14 @@ jobs:
           set -euo pipefail
           gh release create "${{ steps.stage.outputs.version }}" \
             "${{ steps.stage.outputs.apk }}" \
+            "ProLibertateGames.apk" \
             --repo "${{ github.repository }}" \
             --target "${{ github.sha }}" \
             --title "ProLibertateGames ${{ steps.stage.outputs.version }}" \
             --notes "Automated release built from \`${{ github.sha }}\` on push to \`main\`.
 
-          Download **${{ steps.stage.outputs.apk }}** below and install it on an Android device (you may need to allow *Install unknown apps*). This is a debug-signed build."
+          Download **${{ steps.stage.outputs.apk }}** below and install it on an Android device (you may need to allow *Install unknown apps*). This is a debug-signed build.
+
+          Both files below are the same build. \`ProLibertateGames.apk\` is a copy under a fixed name, so this link always fetches the newest release and can be bookmarked or shared:
+
+          https://github.com/${{ github.repository }}/releases/latest/download/ProLibertateGames.apk"