fix(ci): use docker label for runs-on to match Forgejo runner

.forgejo/workflows/lint-and-build.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust toolchain
@@ -15,7 +15,7 @@ jobs:
         run: cargo clippy --all-targets --all-features
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust toolchain
@@ -24,7 +24,7 @@ jobs:
         run: cargo build --release
 
   docker-build:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - name: Checkout
         uses: actions/checkout@v4