docs(readme): add CAmap Nordic & Baltic to Forks section

Add link to the CAmap Nordic & Baltic fork that maps TLS CA sovereignty
for Nordic and Baltic municipalities.

Closes #18

Author: koldex

README.md

@@ -93,6 +93,7 @@ uv run ruff format src tests
 * BE https://mxmap.be/
 * EU https://livenson.github.io/mxmap/
 * LV: https://securit.lv/mxmap
+* [CAmap Nordic & Baltic](https://koldex.github.io/ca-sovereignty-map/) — TLS CA sovereignty for Nordic and Baltic municipalities ([source](https://github.com/koldex/ca-sovereignty-map))
 * See also the forks of this repository