fix: update release-please manifest to current version 1.0.2

The manifest was set to 1.0.0 but the actual codebase is at 1.0.2
(per pyproject.toml and CHANGELOG.md). This caused release-please to
look at all commits since 1.0.0 and bump to 1.0.1 instead of properly
detecting the breaking change (commit 7559751) that should bump to 2.0.0.

By setting the manifest to 1.0.2, release-please will only consider
commits after that version, properly detecting the breaking change
and bumping to 2.0.0.

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

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: semarj

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "1.0.0"
+  ".": "1.0.2"
 }