feat: add link to JavaJAM state transition vectors (#14)

Adding a link to another set of community generated JAM vectors

docs/testing/conformance/index.md

@@ -19,3 +19,7 @@ The Web3 Foundation provides conformance tests at [w3f/jamtestvectors](https://g
 - [Safrole fallback](https://github.com/jam-duna/jamtestnet/tree/main/traces/fallback/jam_duna): this is [Babystep M0.0](/event/jam0-nov204#m00-import-block-safrole-fallback)
 - [Safrole proper](https://github.com/jam-duna/jamtestnet/tree/main/traces/safrole/jam_duna): this is [Babystep M0.1](/event/jam0-nov204#m01-import-block-safrole-proper)
 - [Assurances](https://github.com/jam-duna/jamtestnet/tree/main/traces/assurances/jam_duna)
+
+## JavaJAM
+
+- [Safrole transition vectors](https://github.com/javajamio/javajam-trace)