chore(deps): update jetty monorepo to v12.1.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.eclipse.jetty:jetty-proxy (source)	12.1.7 → 12.1.9
org.eclipse.jetty:jetty-server (source)	12.1.7 → 12.1.9

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[github-actions]

🚀 Performance Analysis

All benchmarks are within the acceptable range. No critical degradation detected (threshold is 100%). Please refer to the detailed report for more information.

Click to see the detailed report

Test	Base Score	PR Score	Change	% Change	Unit	Mode
benchmarks.XmirBench.xmirToEO	12044.327	12025.329	-18.997	-0.16%	ms/op	Average Time

✅ Performance gain: benchmarks.XmirBench.xmirToEO is faster by 18.997 ms/op (0.16%)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[yegor256]

@rultor please, try to merge, since 25 checks have passed

[rultor]

@rultor please, try to merge, since 25 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here.

[rultor]

@rultor please, try to merge, since 25 checks have passed

@yegor256 Done! FYI, the full log is here (took me 16min).

[0crat]

@yegor256 Thanks for the review! You've earned +4 points according to our work policy: +12 points as the standard author bonus, -8 points deducted for absolutely no comments posted during review (as specified in the policy), -4 points deducted for having only 4 hits-of-code (below the 32 minimum threshold), then adjusted to +4 points to meet the policy's minimum reward requirement. Your running score is +101; don't forget to check your Zerocracy account too! 🎯