create dist dirin arm ci for flatpak build

.gitlab-ci.yml

@@ -279,6 +279,7 @@ arm:package:
       tar -czf GridTracker-$version-linux-arm64.tar.gz GridTracker-$version-linux-arm64
       mv GridTracker-$version-linux-arm64.tar.gz artifacts/
       echo -e "\e[0Ksection_start:`date +%s`:flatpaks\e[0K"
+      mkdir -p dist/GridTracker-$version-linux-arm64
       cp -r GridTracker-$version-linux-arm64 dist/GridTracker-$version-linux-arm64
       flatpak-builder flatpak flatpakmanifest.yml --force-clean --repo=flatpakrepo
       flatpak build-bundle flatpakrepo gridtracker-$CI_COMMIT_TAG-arm64.flatpak org.gridtracker.GridTracker