Update relnotes

doc/relnotes/README.md

@@ -18,7 +18,7 @@ evil organizations.
     * Various small optimizations such as making some variables static or const
       and removing unnecessary conditionals
     * Mining now starts faster because instead of only using 2 threads to prepare
-      data needed to mine, now it uses all physical cores
+      data needed to mine, now it uses all physical cores https://git.hush.is/hush/hush3/commit/1b5422eb2ddcedd9aabdf4f039144f9eef5c6f95
   * RandomX mining takes slightly less memory
   * `ac_sapling` is no longer an option for Arrakis Chains
     * All chains enable Sapling at height 1 like Hush + DragonX