Update package URLs to 11ty

Author: zachleat

package.json

@@ -67,14 +67,14 @@
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/mozilla/nunjucks.git"
+    "url": "git+https://github.com/11ty/nunjucks.git"
   },
   "keywords": [
     "template",
     "templating"
   ],
   "license": "BSD-2-Clause",
   "bugs": {
-    "url": "https://github.com/mozilla/nunjucks/issues"
+    "url": "https://github.com/11ty/nunjucks/issues"
   }
 }