settings: Add tooltip to clarify invalid Jitsi URL.

This commit adds a tooltip in organization settings,
when the save button is disabled due to invalid
Jitsi URL.

Fixes #27511.

Co-authored-by: Angelica Ferlin <angelica.ferlin@gmail.com>
Co-authored-by: Peterson Linn <linn@pajp.net>
Co-authored-by: Kislay Verma <kislayuv27@gmail.com>

tools/lib/capitalization.py

@@ -27,6 +27,7 @@ IGNORED_PHRASES = [
     r"Inbox",
     r"IP",
     r"JSON",
+    r"Jitsi",
     r"Kerberos",
     r"LinkedIn",
     r"LDAP",