fix: Helmet console error about NullComponent

[prokopsimek]

fixes #12

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[prokopsimek]

@ViolanteCodes

• fixed the UNSAFE component error
• I tried to fix the frame-ancestors error in the console but I am not sure if the preview mode will work via the iframe in ButterCMS - there is some issue that the CSP 'frame-ancestors' can't be used in meta tag but only set as a request header but in this case of the client-side app I'd have to probably add webpack or any backend server to add the header. (https://content-security-policy.com/frame-ancestors/) I removed the invalid meta tag in the head, we'll see if it helps and still works.
  • works fine for me, please re-test it from your side

[ViolanteCodes]

rebased on top of current main + force pushed