Fix rendering issue with single dollar signs

[colebemis]

Closes #309

This pull request addresses the issue of single dollar signs causing rendering problems in markdown content within the src/components/markdown.tsx file. The solution implemented involves modifying the remarkPlugins array to include configuration options for the remarkMath plugin. Specifically, the singleDollarTextMath option is set to false, which prevents single dollar signs from being interpreted as math expressions. This change ensures that text containing single dollar signs is rendered correctly without being mistakenly formatted as mathematical notation. The modification is made directly in the remarkPlugins array where the remarkMath plugin is initialized, ensuring that the configuration applies to all instances of markdown rendering within the component.

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