build(deps): update prettytable requirement in /.dagger-ci/daggerci

Updates the requirements on [prettytable](https://github.com/prettytable/prettytable) to permit the latest version.
- [Release notes](https://github.com/prettytable/prettytable/releases)
- [Changelog](https://github.com/prettytable/prettytable/blob/main/CHANGELOG.md)
- [Commits](prettytable/prettytable@3.14.0...3.15.1)

---
updated-dependencies:
- dependency-name: prettytable
  dependency-type: direct:production
...

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

Author: dependabot[bot]

.dagger-ci/daggerci/requirements.txt

@@ -1,6 +1,6 @@
 anyio~=4.8
 dagger-io~=0.16
-prettytable~=3.14
+prettytable~=3.15
 pytest~=8.3
 pytest-benchmark~=5.1
 pytest-cov~=6.0