Simplify release process

[DonJayamanne]

just update the change log directly (why do we need news entry files, I think this process is just unnecessarily complicated),

would be easier if we just updated change log directly, no more additionally process

[DonJayamanne]

• No need of news files
• Update change log directly
• Run linter to ensure change log is also updated accordingly (use Bretts github action for this)