Update dependency nokogiri to v1.12.5 [SECURITY]

Gemfile.lock

@@ -46,7 +46,7 @@ GEM
     image_size (2.0.2)
     in_threads (1.5.3)
     method_source (1.0.0)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.6.1)
     minitest (5.14.4)
     multi_json (1.13.1)
     mustermann (1.0.3)
@@ -54,8 +54,9 @@ GEM
       net-ssh (>= 5.0.0, < 6.0.0)
     net-ssh (5.2.0)
     newrelic_rpm (6.7.0.359)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     options (2.3.2)
     progress (3.5.2)
     progress_bar (1.3.0)
@@ -64,6 +65,7 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
+    racc (1.6.0)
     rack (2.2.3)
     rack-protection (2.0.7)
       rack