Use standard runner labels in Gitea workflows

.gitea/workflows/integrations.yml

@@ -17,7 +17,7 @@ permissions:
 
 jobs:
   paper:
-    runs-on: linux-build
+    runs-on: ubuntu-latest
     steps:
       - uses: builtin:checkout
       - uses: actions/setup-java@v4
@@ -47,7 +47,7 @@ jobs:
 
   mods:
     name: Fabric and Forge / ${{ matrix.mc.version }}
-    runs-on: linux-build
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix: