Upgrade ndk for CI (tiann#1941)

Author: yujincheng08

.github/workflows/build-su.yml

@@ -26,14 +26,11 @@ jobs:
         else
           echo "UPLOAD=false" >> $GITHUB_OUTPUT
         fi
-    - uses: nttld/setup-ndk@v1
-      with:
-        ndk-version: r26d
     - name: Build su
       working-directory: ./userspace/su
       run: ndk-build
     - name: Upload a Build Artifact
       uses: actions/upload-artifact@v4
       with:
         name: su
-        path: ./userspace/su/libs
+        path: ./userspace/su/libs