rubocop: Drop "p" from Naming/MethodParameterName allowlist

- It's used to refer to a patch, so use the long name.

Library/.rubocop.yml

@@ -199,7 +199,6 @@ Naming/MethodParameterName:
       "f",
       "ff",
       "o",
-      "p",
       "pr",
     ]
 

Library/Homebrew/cmd/fetch.rb

@@ -152,8 +152,8 @@ module Homebrew
     opoo "Cask reports different sha256: #{e.expected}"
   end
 
-  def self.fetch_patch(p, args:)
-    fetch_fetchable p, args: args
+  def self.fetch_patch(patch, args:)
+    fetch_fetchable patch, args: args
   rescue ChecksumMismatchError => e
     opoo "Patch reports different sha256: #{e.expected}"
     Homebrew.failed = true