FIX: support new Google Analytics id format (#11067)

FIX: support new Google Analytics id format (#11067)

They start with UA- or G- now.

diff --git a/config/site_settings.yml b/config/site_settings.yml
index f457504..ffe941e 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -142,7 +142,7 @@ basic:
   ga_universal_tracking_code:
     client: true
     default: ""
-    regex: "^UA-\\d+-\\d+$"
+    regex: "^(UA|G)-[\\w-]+"
   ga_universal_domain_name:
     client: true
     default: "auto"

GitHub sha: c5eba3f9

This commit appears in #11067 which was approved by eviltrout. It was merged by nlalonde.