Code example search isn't escaping the regex

[docs-bot]

Summarize the problem.

Steps to reproduce:

1. Go to http://localhost:4000/en/actions#code-examples
2. Type in * (one star) and hit Search

Expected result:

Not an error.

Actual result

CodeExamples.tsx?27e8:25 Uncaught SyntaxError: Invalid regular expression: /*/: Nothing to repeat

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extra notes ✏️

• It's any character into the search that can cause an invalid regular expression. E.g. ( or +.
• Offending code:

  docs/components/landing/CodeExamples.tsx

  Line 25 in f36f099

  const matchReg = new RegExp(search, 'i')