Bump mysql2 from 3.9.3 to 3.10.0 in /backstage

Bumps [mysql2](https://github.com/sidorares/node-mysql2) from 3.9.3 to 3.10.0.
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](sidorares/node-mysql2@v3.9.3...v3.10.0)

---
updated-dependencies:
- dependency-name: mysql2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

backstage/yarn.lock

@@ -19939,9 +19939,9 @@ mute-stream@~1.0.0:
   integrity sha512-avsJQhyd+680gKXyG/sQc0nXaC6rBkPOfyHYcFb9+hdkqQkR9bdnkJ0AMZhke0oesPqIO+mFFJ+IdBc7mst4IA==
 
 mysql2@^3.0.0:
-  version "3.9.3"
-  resolved "https://registry.yarnpkg.com/mysql2/-/mysql2-3.9.3.tgz#72a5e0c90d78ec2d8f9846e83727067c0cc8c25e"
-  integrity sha512-+ZaoF0llESUy7BffccHG+urErHcWPZ/WuzYAA9TEeLaDYyke3/3D+VQDzK9xzRnXpd0eMtRf0WNOeo4Q1Baung==
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/mysql2/-/mysql2-3.10.0.tgz#5109449fda3dc03fb7d6bdf2cf91f97477081987"
+  integrity sha512-qx0mfWYt1DpTPkw8mAcHW/OwqqyNqBLBHvY5IjN8+icIYTjt6znrgYJ+gxqNNRpVknb5Wc/gcCM4XjbCR0j5tw==
   dependencies:
     denque "^2.1.0"
     generate-function "^2.3.1"