[Feature]: Adding the dummy_commit_message option for customizing the dummy commit message

[bumb7ebee]

Is your feature request related to a problem? Please describe.
No. It might be a good idea to customize the dummy commit message.
Customize the dummy commit message that occurs when the enable_keepalive option is triggered.

Describe the solution you'd like

Describe alternatives you've considered

Additional context

Double check the following

Before creating a feature request, Please make sure that you had done the following, add a checkmark if done by marking it with [x]:

• This feature cannot be accomplished using any of the available options provided by the workflow.
• I had followed all the steps mentioned in the documentation

[gautamkrishnar]

@bumb7ebee This is a good enhancement, I was planning to migrate this action to keepalive-workflow v2 which removes the use of dummy commits entirely. But this is a good enhancement to have.

[bumb7ebee]

@bumb7ebee This is a good enhancement, I was planning to migrate this action to keepalive-workflow v2 which removes the use of dummy commits entirely. But this is a good enhancement to have.

Thank you!