docs: update chains contributions (#43)

Author: algomaster99

chains-opensource.md

@@ -29,6 +29,8 @@ Applications:
   * [enabling reproducible builds: vcs.modified=true on downloadable artefacts](https://github.com/ethereum/go-ethereum/issues/30324)
 * Diffoscope
   * [Propose fix for disabling syntax highlighting in the diff](https://lists.reproducible-builds.org/pipermail/diffoscope/2024-August/002783.html)
+* Reproducible-Central
+  * [Use HTTPS to clone in buildspec](https://github.com/jvm-repo-rebuild/reproducible-central/pull/768)
 
 Under our radar (not opened by us but relevant)
 * [sandboxed build scripts at rust](https://github.com/rust-lang/rust-project-goals/issues/108)