chore(rust): fix version bump for reqwest client cargo override file (#232)

## Summary
- Add rust/reqwest-client.toml to bumpversion configuration to ensure it
gets updated along with other version files during releases

## Test plan
- [ ] Verify bumpversion configuration includes the new file
- [ ] Test version bumping works correctly with the reqwest-client.toml
file

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: jackye1995

.bumpversion.toml

@@ -107,4 +107,9 @@ replace = 'version = "{new_version}"'
 [[tool.bumpversion.files]]
 filename = "rust/lance-namespace/Cargo.toml"
 search = 'version = "{current_version}"'
+replace = 'version = "{new_version}"'
+
+[[tool.bumpversion.files]]
+filename = "rust/reqwest-client.toml"
+search = 'version = "{current_version}"'
 replace = 'version = "{new_version}"'