[photoview] Fix bug in building UI

ansible/roles/photoview/tasks/main.yml

@@ -71,7 +71,7 @@
 - name: Photoview UI installed
   shell:
     cmd: npm install
-    chdir: /usr/local/src/photoview/api
+    chdir: /usr/local/src/photoview/ui
 
 - name: Photoview API built
   shell: