Disable Metrics/LineLength for long URL lines in patches_spec.rb

- The final two `brew style` offenses were for Metrics/LineLength where
  parsing the GitHub diff URL as a regex took 119/118 lines.
- This disables the cop for each of those long, problematic lines, and
  re-enables them straight afterwards, else they'd apply to the whole file
  from the first occurrence onwards, which we probably don't want?
- I wondered about increasing the LineLength limit to 119 or 120, but
  it appears to have been set for a justifiable reason in 80d75bc0d8.

Library/Homebrew/test/rubocops/patches_spec.rb

@@ -88,7 +88,9 @@ describe RuboCop::Cop::FormulaAudit::Patches do
              line:     5,
              column:   5,
              source:   source }]
+        # rubocop:disable Metrics/LineLength
         elsif %r{https?://patch-diff\.githubusercontent\.com/raw/(.+)/(.+)/pull/(.+)\.(?:diff|patch)}.match?(patch_url)
+          # rubocop:enable Metrics/LineLength
           [{ message:
                        <<~EOS,
                          use GitHub pull request URLs:
@@ -223,7 +225,9 @@ describe RuboCop::Cop::FormulaAudit::Patches do
              line:     5,
              column:   9,
              source:   source }]
+        # rubocop:disable Metrics/LineLength
         elsif %r{https?://patch-diff\.githubusercontent\.com/raw/(.+)/(.+)/pull/(.+)\.(?:diff|patch)}.match?(patch_url)
+          # rubocop:enable Metrics/LineLength
           [{ message:
                        <<~EOS,
                          use GitHub pull request URLs: