Update README.md

Fixed 1 potential misspelling/error.

Author: Jun

01-Introduction-to-GitHub/README.md

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 This learning module dives into the fundamental aspects of GitHub, a premier AI-powered developer platform that facilitates collaborative software development. Aimed at new developers, GitHub novices, and students, the module provides a hands-on experience within a GitHub repository, offering a comprehensive overview of essential features.
 
-People use GitHub everyday to build some of the most advanced technologies on the planet. Whether you’re visualizing data or building a new game, there’s a whole community and set of tools on GitHub that can help you do it even better. 
+People use GitHub every day to build some of the most advanced technologies on the planet. Whether you’re visualizing data or building a new game, there’s a whole community and set of tools on GitHub that can help you do it even better. 
 
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