[python] add bump for dev version for http-client-python (#6190)

Co-authored-by: iscai-msft <isabellavcai@gmail.com>
Co-authored-by: Yuchao Yan <yuchaoyan@microsoft.com>

.chronus/changes/python-addDevRelease-2025-1-27-22-33-22.md

@@ -0,0 +1,8 @@
+---
+# Change versionKind to one of: internal, fix, dependencies, feature, deprecation, breaking
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+[python] add bump for dev version for http-client-python

packages/http-client-python/eng/pipeline/publish.yml

@@ -30,3 +30,9 @@ extends:
           LanguageShortName: "python"
           CadlRanchName: "@typespec/http-client-python"
           EnableCadlRanchReport: false
+      - script:
+          # https://github.com/timotheeguerin/chronus/issues/359, `--prerelease` does not respect `--only`
+          pnpm chronus version --prerelease --only @typespec/http-client-python
+          git add $(Build.SourcesDirectory)/packages/http-client-python
+          git checkout -- $(Build.SourcesDirectory)
+        displayName: Bump version for dev release of Python client