ci: fix deploy dir

.github/workflows/docs.yml

@@ -22,9 +22,9 @@ jobs:
 
       - name: Build
         run: cd docs &&
-          cd guide && mdbook build -d ../docs/nightly/guide && cd .. &&
-          cd reference && mdbook build -d ../docs/nightly/reference && cd .. &&
-          cd router && mdbook build -d ../docs/nightly/router  && cd ..
+          cd guide && mdbook build -d ../nightly/guide && cd .. &&
+          cd reference && mdbook build -d ../nightly/reference && cd .. &&
+          cd router && mdbook build -d ../nightly/router  && cd ..
 
       - name: Deploy 🚀
         uses: JamesIves/github-pages-deploy-action@v4.2.3