Docs: Package name guidlines (Uppercase exclusion) (#1586)

## Changes:
- Capitalization
- Add ` Does not contain uppercase letters`
- Remove redundant bulletpoint
- Spelling checks

## References

 Closes #136

Author: kenshanta

content/packages-and-modules/contributing-packages-to-the-registry/package-name-guidelines.mdx

@@ -2,17 +2,17 @@
 title: Package name guidelines
 ---
 
-When choosing a name for your package, choose a name that
+When choosing a name for your package, choose a name that:
 
-- is unique
-- is descriptive
-- meets [npm policy guidelines][policies]. For example, do not give your package an offensive name, and do not use someone else's trademarked name or violate the [npm trademark policy][npm-trademark].
+- Is unique
+- Is descriptive
+- Meets [npm policy guidelines][policies]. For example, do not give your package an offensive name, and do not use someone else's trademarked name or violate the [npm trademark policy][npm-trademark].
+- Does _not_ contain uppercase letters
 
-Additionally, when choosing a name for an [**unscoped** package][create-unscoped], also choose a name that
+Additionally, when choosing a name for an [**unscoped** package][create-unscoped], choose a name that:
 
-- is not already owned by someone else
-- is not spelled in a similar way to another package name
-- will not confuse others about authorship
+- Is not spelled in a similar way to another package name
+- Will not confuse others about authorship
 
 [policies]: https://www.npmjs.com/policies
 [npm-trademark]: https://docs.npmjs.com/policies/disputes#trademarks