Update nokogiri for security

Author: PeterJCLaw

Gemfile.lock

@@ -55,20 +55,20 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.8.1)
+    mini_portile2 (2.8.5)
     neat (3.0.0)
       sass (~> 3.4)
       thor (~> 0.19)
-    nokogiri (1.14.3)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.15.5)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.14.3-x64-mingw32)
+    nokogiri (1.15.5-x64-mingw32)
       racc (~> 1.4)
     parallel (1.22.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (5.0.0)
-    racc (1.6.2)
+    racc (1.7.3)
     rainbow (3.1.1)
     rake (12.3.3)
     rb-fsevent (0.11.0)