style: Correct tabulation

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2039>

deploy/nginx.template

@@ -150,6 +150,6 @@ server {
     }
 
     location /manifest.json {
-           return 302 /api/v1/instance/spa-manifest.json;
-      }
+        return 302 /api/v1/instance/spa-manifest.json;
+    }
 }