fix(security): patch nokogiri dependency vulnerabilities (#675)

Author: matthv

Gemfile.lock

@@ -134,7 +134,7 @@ GEM
     marcel (1.0.4)
     method_source (1.0.0)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.5)
+    mini_portile2 (2.8.6)
     minitest (5.17.0)
     multi_xml (0.6.0)
     net-http (0.4.1)
@@ -149,7 +149,7 @@ GEM
     net-smtp (0.3.3)
       net-protocol
     nio4r (2.7.0)
-    nokogiri (1.16.2)
+    nokogiri (1.16.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     openid_connect (1.4.2)