VideoPress v5: Incorporate recent fixes and improvements

[SiobhyB]

Bumps the Jetpack reference to 9123233901a71ce210e010057447ee8cbfafda48 to ensure inclusion of the following recent changes:

• RNMobile: Detect and avoid invalid media URLs in VideoPress v5 block Automattic/jetpack#35961
• RNMobile: Fix edge case where VideoPress v5 could mistakenly appears empty Automattic/jetpack#35957

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered if this change warrants user-facing release notes more info and have added them to RELEASE-NOTES.txt if necessary.

[geriux]

LGTM!