Bump GitPython to 3.1.30

3.1.30 includes 2 sets of fixes for CVE-2022-24439:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-24439
  gitpython-developers/GitPython#1515

PRs:
  gitpython-developers/GitPython#1518
  gitpython-developers/GitPython#1521

Signed-off-by: Lon Hohberger <[email protected]>
Change-Id: I0def2d9801f0b20fcc9b613165a29dbced1fd2d7

Author: lhh

upper-constraints.txt

@@ -463,7 +463,7 @@ testresources===2.0.1
 falcon===3.1.0
 etcd3gw===2.1.0
 Flask-RESTful===0.3.9
-GitPython===3.1.28
+GitPython===3.1.30
 python-ironicclient===5.0.1
 XStatic===1.0.2
 XStatic-Angular-FileUpload===12.0.4.0