ci: fix runner labels (hanzo-build pool)

Imaginary runner label `lux-build-linux-amd64` does not exist. The live
amd64 pool is `hanzo-build-linux-amd64`.

- build-lux.yml: build + deploy jobs

.github/workflows/build-lux.yml

@@ -31,7 +31,7 @@ env:
 
 jobs:
   build:
-    runs-on: lux-build-linux-amd64
+    runs-on: hanzo-build-linux-amd64
     permissions:
       contents: read
       packages: write
@@ -80,7 +80,7 @@ jobs:
   deploy:
     needs: build
     if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
-    runs-on: lux-build-linux-amd64
+    runs-on: hanzo-build-linux-amd64
     permissions:
       contents: read
     steps: