Set Jetpack 12.9 as default for WP 6.3+

[rebeccahum]

Description

All WP sites running 6.3 and above will be updated to Jetpack 12.9 as their default if not pinned

Changelog Description

Plugin Updated: Jetpack 12.9

We upgraded Jetpack 12.8 to 12.9 on all unpinned WP 6.3+ sites

Pre-review checklist

Please make sure the items below have been covered before requesting a review:

• This change works and has been tested locally (or has an appropriate fallback).
• This change works and has been tested on a Go sandbox.
• This change has relevant unit tests (if applicable).
• This change uses a rollout method to ease with deployment (if applicable - especially for large scale actions that require writes).
• This change has relevant documentation additions / updates (if applicable).
• I've created a changelog description that aligns with the provided examples.

Pre-deploy checklist

• VIP staff: Ensure any alerts added/updated conform to internal standards (see internal documentation).

Steps to Test

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b4073f2) 28.83% compared to head (e5abdd0) 28.76%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #5082      +/-   ##
=============================================
- Coverage      28.83%   28.76%   -0.07%     
  Complexity      4761     4761              
=============================================
  Files            279      279              
  Lines          20988    20978      -10     
=============================================
- Hits            6051     6035      -16     
- Misses         14937    14943       +6     

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