(#440) Fix dynamic code block issue with regex

[alexaveldanez]

Description Of Changes

Added regex to find exact match when doing a replace all in the dynamic code block.

Motivation and Context

This is necessary to fix issue where having multiple dynamic code block inputs on a page and one input name or variable has no number but other inputs do have a number in the name attribute variable it was causing the find and replace functionality in the dynamic code block component to break.

Testing

1. Pull down the branch locally by running gh pr checkout
2. From the local repository run yarn build.
3. In local docs repository run yarn link choco-theme.
4. Open any docs .mdx file.
5. Add imports for <DynamicCodeBlockInput /> and <DynamicCodeBlock /> .
6. Add 3 <DynamicCodeBlockInput /> components with the following names: codeBlockReplace, codeBlockReplace2, codeBlockReplace3.
7. Add a <DynamicCodeBlock /> with code and include the 3 replace variables within the code.
8. Test that all the inputs work properly and correctly replace the variables in the code block with the text from the input.

Operating Systems Testing

n/a

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v3 compatibility checked?

Related Issue

#440

Fixes #440