Bump ibek from 1.6.2 to 1.6.3

Bumps [ibek](https://github.com/epics-containers/ibek) from 1.6.2 to 1.6.3.
- [Release notes](https://github.com/epics-containers/ibek/releases)
- [Changelog](https://github.com/epics-containers/ibek/blob/main/CHANGELOG.rst)
- [Commits](epics-containers/ibek@1.6.2...1.6.3)

---
updated-dependencies:
- dependency-name: ibek
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -1,3 +1,3 @@
-ibek==1.6.2
+ibek==1.6.3
 # to install direct from github during development in a branch
 # git+https://github.com/epics-containers/ibek.git@fix-extract-assets