format JSON example

Author: ethanpalm

authentication-personalization/authentication-setup.mdx

@@ -275,8 +275,8 @@ To make all pages in a group public, add `"public": true` beneath the group's na
     "groups": [
       {
         "group": "Public group",
-		    "public": true,
-		    "icon": "play",
+        "public": true,
+        "icon": "play",
         "pages": [
           "quickstart",
           "installation",
@@ -285,7 +285,7 @@ To make all pages in a group public, add `"public": true` beneath the group's na
       },
       {
         "group": "Private group",
- 		    "icon": "pause",
+        "icon": "pause",
         "pages": [
           "private-information",
           "secret-settings"