fix: typo Github -> GitHub

Signed-off-by: Jason C. Nucciarone <[email protected]>

index.md

@@ -6,7 +6,7 @@ high-performance computing clusters ⚛️
 ```{warning}
 Charmed HPC is currently in _pre-alpha_; some things might not work as expected.
 Interested in being an early adopter? Please report any issues you have with
-Charmed HPC on [Github](https://github.com/orgs/charmed-hpc/discussions/new?category=q-a&title=%5BISSUE%5D%3A+ADD+YOUR+ISSUE+HERE&body=*Please+describe+your+question+or+issue+with+Charmed+HPC*%0A%0A%0A%0A%0A---%0A*Redirected+from+document%3A+index.md*)!
+Charmed HPC on [GitHub](https://github.com/orgs/charmed-hpc/discussions/new?category=q-a&title=%5BISSUE%5D%3A+ADD+YOUR+ISSUE+HERE&body=*Please+describe+your+question+or+issue+with+Charmed+HPC*%0A%0A%0A%0A%0A---%0A*Redirected+from+document%3A+index.md*)!
 ```
 
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