chore: upgrade linkify-it to ^5.0.2 to address CVE-2026-59887

Refreshes the yarn.lock entry for linkify-it (transitive via markdown-it)
from 5.0.1 to 5.0.2, resolving the quadratic-complexity DoS in the
mailto: schema validator scan-loop.

Generated with [Linear](https://linear.app/sourcebot/issue/SOU-1579/sourcebot-devsourcebot-cve-2026-59887-linkify-it-quadratic-complexity#agent-session-00ff015e)

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>

Author: linear-code[bot]

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Upgraded `tar` to `^7.5.20`. [#1474](https://github.com/sourcebot-dev/sourcebot/pull/1474)
+- Upgraded `linkify-it` to `^5.0.2`. [#1476](https://github.com/sourcebot-dev/sourcebot/pull/1476)
 
 ### Changed
 - Reduced Sentry span sampling to 10% outside development. [#1475](https://github.com/sourcebot-dev/sourcebot/pull/1475)

yarn.lock

@@ -17376,11 +17376,11 @@ __metadata:
   linkType: hard
 
 "linkify-it@npm:^5.0.1":
-  version: 5.0.1
-  resolution: "linkify-it@npm:5.0.1"
+  version: 5.0.2
+  resolution: "linkify-it@npm:5.0.2"
   dependencies:
     uc.micro: "npm:^2.0.0"
-  checksum: 10c0/d06d04f1ed03be131740fc900a5e74ea1f49886b052213599e306d469d5ffe2303db76dd8f771de9f28e2b0b38852de22ec46ae597d245f8b66439b0ceb19b10
+  checksum: 10c0/dd70b1735a13d41a2cff0a058ac3771166038f23f6aff004dd53873cf985c64b107902fe0b544a5b3d1ff6e63249cf9c648fb3ae9f285481db48f56887adb0d6
   languageName: node
   linkType: hard