[Schematics] : Update scematics action docs related to git token

[VaishnaviGopal]

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment

New or Affected Resource(s) or Datasource(s)

• ibm_schematics_action

Description

References

• #0000

[VaishnaviGopal]

Currently we are passing git_token as part of git source field.
But it is handled internally with x_github_token field.

So, we need to update documentation