chore(deps): bump jenkins/ssh-agent in /dockerfiles/python

Bumps jenkins/ssh-agent from 7.2.0-jdk21 to 7.3.0-jdk21.

---
updated-dependencies:
- dependency-name: jenkins/ssh-agent
  dependency-version: 7.3.0-jdk21
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

dockerfiles/python/Dockerfile

@@ -1,7 +1,7 @@
 # This Dockerfile is used to create a Jenkins SSH agent with Python and several Python packages installed in order to run the python sample tutorial.
 
 # We start from the Jenkins SSH agent image version 5.20.0.
-FROM jenkins/ssh-agent:7.2.0-jdk21 as ssh-agent
+FROM jenkins/ssh-agent:7.3.0-jdk21 as ssh-agent
 
 # The RUN command executes a series of commands in the new layer of the image and commits the results.
 # The following commands are executed: