[Bug] Rename default branch to main

[TimidRobot]

Description

Default branch names needs to be updated per:

• [Meta] Support "main" as a default branch name creativecommons.org#1125

However, main is not yet supported by Lektor v3.3.x:

• Github Pages: Change default branch from "master" -> "main" lektor/lektor#978 (comment)

  This is not yet in the 3.3.x branch.

  • Verified that v3.3.11 (2024-02-27) doesn't contain the fix

Expectation

Update default branch name to main once Lektor support is updated.

[Abdullahhh12]

Can I contribute ?

[Gorachand-Senapati]

@TimidRobot I already changed default branch to main but I don't understand how change in this issue ,please suggest me how I do this?fix