Update omniauth-saml to version 2.2.1

Author: depfu[bot]

Gemfile.lock

@@ -269,9 +269,9 @@ GEM
     omniauth-rails_csrf_protection (1.0.2)
       actionpack (>= 4.2)
       omniauth (~> 2.0)
-    omniauth-saml (2.1.0)
-      omniauth (~> 2.0)
-      ruby-saml (~> 1.12)
+    omniauth-saml (2.2.1)
+      omniauth (~> 2.1)
+      ruby-saml (~> 1.17)
     orm_adapter (0.5.0)
     paper_trail (15.1.0)
       activerecord (>= 6.1)