chore(release): Bump version to 7.12.3

[nickvergessen]

v7.12.3 (2023-08-24)

Full Changelog

🐛 Fixed bugs

• [stable7] try to fix header size on mobile by @szaimen in [stable7] try to fix header size on mobile #4421
• [stable7] fix(NcListItem): remove empty wrapper for additional elements from DOM if not needed by @Antreesy in https://github.com/nextcloud-libraries/nextcloud-vue/pul>
• [stable7] Prevent accessible name conflicts on action menu by @Pytal in [stable7] Prevent accessible name conflicts on action menu #4450
• [stable7] fix(NcBreadcrumbs): adjust component for vue filepicker by @raimund-schluessler in [stable7] fix(NcBreadcrumbs): adjust component for vue filepicker #4452
• [stable7] fix: Rename name to title by @Pytal in [stable7] fix: Rename name → title #4455
• [stable7] fix(NcListItem): don't force blur action menu on tab by @Antreesy in [stable7] fix(NcListItem) don't force blur action menu on tab #4459
• [stable7] fix(NcRichText): keep newlines in rendered Markdown by @Antreesy in [stable7] fix(NcRichText) - keep newlines in rendered Markdown  #4462

[szaimen]

Fine by me