bump-formula-pr: handle url with specs hash

[samford]

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As mentioned in #13471, the existing bump-formula-pr regexes expect a url string to only be followed by a newline. However, url also accepts a specs hash, which can appear after the url string. For example:

url "https://www.example.com/1.2.3.tar.gz", using: :homebrew_curl

This commit modifies the regexes to capture anything after the url string and before the newline. This works for the aforementioned example, where the trailing hash is on the same line, but it won't work if the hash appears on a subsequent line. For example:

url "https://www.example.com/1.2.3.tar.gz",
  using: :homebrew_curl

I spent some time trying to create a regex that would also work for the latter case but didn't meet with success (my brain is a bit too tired tonight). Since we don't have any instances of the multiline format in homebrew/core yet, there's something to be said for merging this PR in the short-term to fix brew bump-formula-pr and we can adjust this in a follow-up PR if we come up with a more comprehensive solution.

Fixes #13471.

[BrewTestBot]

Review period skipped due to critical label.

[Bo98]

I spent some time trying to create a regex that would also work for the latter case but didn't meet with success (my brain is a bit too tired tonight).

The answer there would be to do proper AST parsing instead, but that's a bigger rewrite.