Bump devpi-server from 6.19.2 to 6.19.3 in /server

Bumps [devpi-server](https://github.com/devpi/devpi) from 6.19.2 to 6.19.3.
- [Changelog](https://github.com/devpi/devpi/blob/main/doc/changelog.rst)
- [Commits](devpi/devpi@server-6.19.2...server-6.19.3)

---
updated-dependencies:
- dependency-name: devpi-server
  dependency-version: 6.19.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

server/requirements.txt

@@ -1,2 +1,2 @@
-devpi-server==6.19.2
+devpi-server==6.19.3
 devpi-web==5.0.2