small improvements

dev/gitea-runner.yaml

@@ -27,7 +27,7 @@ data:
       capacity: 4
       timeout: 1h
       labels:
-        - "ubuntu-arm64:docker://docker.gitea.com/runner-images:ubuntu-latest-slim"
+        - "ubuntu-arm64:docker://docker.gitea.com/runner-images:ubuntu-latest"
 ---
 # PersistentVolumeClaim for AMD64
 apiVersion: v1
@@ -176,7 +176,7 @@ spec:
           requiredDuringSchedulingIgnoredDuringExecution:
             nodeSelectorTerms:
             - matchExpressions:
-              - key: kubernetes.io/arch
+              - key: kubernetes.io/hostname
                 operator: In
                 values:
-                - arm64
+                - nexus