Fix typo in Github connector docs

[smartfin]

Title: Fix typo in docs for Github connector

Summary:
Provide a brief overview of what the PR does and why it is needed.

Details:
Explain the changes in detail, including any relevant context or background information.

Related Issues:
Reference any related issues or tickets

Testing Instructions:
Describe how the changes were tested. Include any test cases or steps to verify the functionality.
Please include the below test scenario with your changes.

• Create the resource and execute terraform apply. (Verify the resource is created)
• Execute terraform apply again without any changes. (Verify no changes should be done)
• Update the resource and execute terraform apply. (Verify the resource updated successfully)
• Remove the content from resource file and execute terraform apply. (Verify the resource has been deleted)
• Add again the resource and execute the terraform apply. (Verify the resource is created)
• Verify the import the resource file is working fine.
• In case of remote entity, Verify for both default and non default branch.

Screenshots:
Include before and after screenshots to visually demonstrate the changes.
Checklist:

• Code changes are well-documented.
• Tests have been added/updated.
• Changes have been tested locally.
• Documentation has been updated.

PR Check triggers

• Build: trigger build
• Sub Category Field Check: trigger subcategoryfieldcheck
• gitleaks: trigger gitleaks

[CLAassistant]

All committers have signed the CLA.

[ritek01]

LGTM