[ci] fix doxygen ci grammar error

.github/workflows/doxygen.yml

@@ -23,10 +23,9 @@ on:
 
 jobs:
   build:
-    if: false # disable this job
     runs-on: ubuntu-latest
     name: doxygen_doc generate
-    if: github.repository_owner == 'RT-Thread'
+    if: github.repository_owner == 'RT-Thread' && false
     steps:
       - uses: actions/checkout@v4
         with: