ci: fix runner label to dotfiles

.gitea/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   syntax-check:
-    runs-on: linux_amd64
+    runs-on: dotfiles
     steps:
       - name: Checkout
         run: |
@@ -43,7 +43,7 @@ jobs:
           done
 
   memory-leak-check:
-    runs-on: linux_amd64
+    runs-on: dotfiles
     container:
       image: python:2.7-slim
     steps:
@@ -128,3 +128,4 @@ try:
 except Exception as e:
     print('FAIL mysqlite:', e)
 "
+