Update Readme for ValidatePattern

[christianmaza]

Hello, I recently downloaded this package via NPM and found that the documentation used for the "validatePattern" rule wasn't working. After digging into the source code a little more I found that the rule should be "ValidatePattern" instead of "validatePattern". It's just a simple case change, however, I believe it would save devs some time.

[leapful]

@christianmaza

There is no ValidatePattern or validatePattern in the documentation of react-hook-form. Could you please share what source that you have found this rule ?

[christianmaza]

Sorry, I actually wrote this issue for the wrong package. I meant to write it for form-validation-react :/ Thank you for reaching back out though.