[R2] Update changelog with latest release#22144

Oxyjun merged 4 commits intocloudflare:productioncloudflare/cloudflare-docs:productionfrom

rahulsuresh-cf:rsuresh/r2-dash-updates-changelograhulsuresh-cf/cloudflare-docs:rsuresh/r2-dash-updates-changelogCopy head branch name to clipboard