chore(docs): add missing release note for #4595 (#4597) (#4601)

## Description

#4595 should have included a release note, this is the note for that PR.

## Reviewer Checklist
- [x] Title is accurate.
- [x] Description motivates each change.
- [x] No unnecessary changes were introduced in this PR.
- [x] Avoid breaking [API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces) changes unless absolutely necessary.
- [x] Tests provided or description of manual testing performed is included in the code or PR.
- [x] Release note has been added for fixes and features, or else `changelog/no-changelog` label added.
- [x] All relevant GitHub issues are correctly linked.
- [x] Backports are identified and tagged with Mergifyio.

(cherry picked from commit 7dd5f6a)

Co-authored-by: Brett Langdon <brett.langdon@datadoghq.com>
Co-authored-by: Yun Kim <35776586+Yun-Kim@users.noreply.github.com>

releasenotes/notes/fix-httpx-0.23.1-compatibility-99884a43d17b1222.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    httpx: Fixes an incompatibility from ``httpx==0.23.1`` when the ``URL.raw`` property is not available.