valid-title is not triggered for disallowedWord with special character

[aaron-goff]

When trying to modify our usage of valid-title, I wanted to add a disallowedWord for '@new', as we somewhat frequently use this for ease of use in finding just the new tests we're working on writing. With the following setup in our .eslintrc.cjs file:

...
'playwright/valid-title': [
          'error',
          {
            disallowedWords: ['@new']
          }
        ]
...

The following is still considered valid:

test('@new', async () => {
    expect(true).toBe(true);
  });

I've tested this with !, @, #, and $, and none are picked up by the linter. I also validated the rest of my setup was fine, by changing '@new' to 'new', which does trigger the linting error.

[mskelton]

Going to close in favor of #342, not sure I want to mess with this in valid-title since using tags in titles isn't really the recommended approach anymore with the tags option.