[BUG] [CCI] Update the default branch in changelog.js

[andreymyssak]

Describe the bug

The default branch is now main and therefore the main section is not removed from the changelog.

oui/src-docs/src/views/package/changelog.js

Lines 17 to 20 in ce8acf4

	const changelogSource = require('!!raw-loader!../../../../CHANGELOG.md').default.replace(
	/## \[`master`\].+?##/s, // remove the `master` heading & contents
	'##'
	);

To Reproduce
Steps to reproduce the behavior:

1. Open http://localhost:8030/#/package/changelog
2. See the main section

Expected behavior
The main section must be hidden

OpenSearch Version
Main branch (localhost)

Screenshots

[BigSamu]

@joshuarrrr @BSFishy,

I would like to work on this issue

[BSFishy]

Oops, sorry @BigSamu this is worked on in #1050. Forgot to tag the issue!

[BigSamu]

No worries @BSFishy ! Thanks for letting me know!