chore(deps): bump pydantic from 2.6.3 to 2.6.4

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.6.3 to 2.6.4.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.6.3...v2.6.4)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/main.txt

@@ -1323,9 +1323,9 @@ pycurl==7.45.3 \
     #   -r requirements/main.in
     #   celery
     #   kombu
-pydantic==2.6.3 \
-    --hash=sha256:72c6034df47f46ccdf81869fddb81aade68056003900a8724a4f160700016a2a \
-    --hash=sha256:e07805c4c7f5c6826e33a1d4c9d47950d7eaf34868e2690f8594d2e30241f11f
+pydantic==2.6.4 \
+    --hash=sha256:b1704e0847db01817624a6b86766967f552dd9dbf3afba4004409f908dcc84e6 \
+    --hash=sha256:cc46fce86607580867bdc3361ad462bab9c222ef042d3da86f2fb333e1d916c5
     # via
     #   -r requirements/main.in
     #   webauthn