FIX: Add `/session/sso` service-worker workaround for chrome 97 (#15630)

Followup to 2278c7f82d. Depending on the site's SSO implementation, this route is also used as part of a redirect sequence and needs to be able to set cookies.

Chrome bug reference: https://bugs.chromium.org/p/chromium/issues/detail?id=1286367

app/assets/javascripts/service-worker.js.erb

@@ -7,7 +7,7 @@ workbox.setConfig({
   debug: false
 });
 
-var authUrls = ["auth", "session/sso_login"].map(path => `<%= Discourse.base_path %>/${path}`);
+var authUrls = ["auth", "session/sso_login", "session/sso"].map(path => `<%= Discourse.base_path %>/${path}`);
 
 var cacheVersion = "1";
 var discourseCacheName = "discourse-" + cacheVersion;