infra: bump astroid from 2.14.2 to 2.15.3 in /dockerfile

Bumps [astroid](https://github.com/PyCQA/astroid) from 2.14.2 to 2.15.3.
- [Release notes](https://github.com/PyCQA/astroid/releases)
- [Changelog](https://github.com/pylint-dev/astroid/blob/main/ChangeLog)
- [Commits](pylint-dev/astroid@v2.14.2...v2.15.3)

---
updated-dependencies:
- dependency-name: astroid
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

dockerfile/anaconda-ci/requirements.txt

@@ -18,4 +18,4 @@ jinja2
 
 # pylint and its supporting libs
 pylint == 2.17.2
-astroid == 2.15.2
+astroid == 2.15.3