Update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/appimage-nightly.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Make AppImage
         run: DEVEL_RELEASE=1 /bin/sh ./make-appimage.sh
       - name: Upload artifact
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: AppImage-${{ matrix.arch }}
           path: dist

.github/workflows/appimage.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Make AppImage
         run: /bin/sh ./make-appimage.sh
       - name: Upload artifact
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: AppImage-${{ matrix.arch }}
           path: dist