minor #24439 Add changelog for deprecated DbalSessionHandler (Tobion)
minor #24439 Add changelog for deprecated DbalSessionHandler (Tobion)

This PR was merged into the 3.4 branch.

Discussion
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Add changelog for deprecated DbalSessionHandler

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no <!-- don't forget to update src/**/CHANGELOG.md files -->
| BC breaks?    | no
| Deprecations? | no <!-- don't forget to update UPGRADE-*.md files -->
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Add missing changelog/upgrade for #24389

Commits
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af0aa1e530 Add changelog for deprecated DbalSessionHandler

symfony/doctrine-bridge,symfony/DoctrineBridge