ci: use rpmdyn rather than rpm-py-installer

rohanpm · rohanpm · commit a1f49b321fe5 · 2025-01-21T14:34:52.000+11:00
As can be seen in recent CI logs, rpm-py-installer is not installable
in CI with the latest versions of all dependencies.
diff --git a/test-requirements.txt b/test-requirements.txt
@@ -1,5 +1,5 @@
 pytest
 mock
 pushsource
-rpm-py-installer
+rpmdyn
 bandit==1.7.5
