chore(ci): Unify artifact versions

.forgejo/workflows/build-debian.yml

@@ -127,7 +127,7 @@ jobs:
           [ -f /etc/conduwuit/conduwuit.toml ] && echo "✅ Config file installed"
 
       - name: Upload deb artifact
-        uses: actions/upload-artifact@v3
+        uses: forgejo/upload-artifact@v4
         with:
           name: continuwuity-${{ steps.debian-version.outputs.distribution }}
           path: ${{ steps.cargo-deb.outputs.path }}

.forgejo/workflows/build-fedora.yml

@@ -239,13 +239,13 @@ jobs:
           cp $BIN_RPM upload-bin/
 
       - name: Upload binary RPM
-        uses: actions/upload-artifact@v3
+        uses: forgejo/upload-artifact@v4
         with:
           name: continuwuity
           path: upload-bin/
 
       - name: Upload debug RPM artifact
-        uses: actions/upload-artifact@v3
+        uses: forgejo/upload-artifact@v4
         with:
           name: continuwuity-debug
           path: artifacts/*debuginfo*.rpm

.forgejo/workflows/element.yml

@@ -109,7 +109,7 @@ jobs:
           cat ./element-web/webapp/config.json
 
       - name: 📤 Upload Artifact
-        uses: forgejo/upload-artifact@v3
+        uses: forgejo/upload-artifact@v4
         with:
           name: element-web
           path: ./element-web/webapp/