Update docs for global functions

[rimildeyjsr]

Fix styles and broken links for global functions

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

No tests needed

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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Name	Status	Preview	Updated
appsmith	🔄 Building (Inspect)		May 19, 2022 at 1:50PM (UTC)

[github-actions]

Unable to find test scripts. Please add necessary tests to the PR.