readme: add reference to hmLeaderboard

README.md

@@ -51,6 +51,8 @@ Current best models:
 | [`hmbyt5-preliminary/byt5-small-historic-multilingual-flax`](https://huggingface.co/hmbyt5-preliminary/byt5-small-historic-multilingual-flax)                                   | 83.28 ± 1.67 | 86.98 ± 0.71 | 83.49 ± 1.06 | 76.96 ± 1.58    | 78.80 ± 1.89    | 86.47 ± 0.79 | 77.43 ± 0.51 |      |
 | [`hmbyt5-preliminary/byt5-small-historic-multilingual-span20-flax`](https://huggingface.co/hmbyt5-preliminary/byt5-small-historic-multilingual-span20-flax)                     | 84.91 ± 0.86 | 88.02 ± 0.35 | 84.78 ± 0.75 | 77.77 ± 1.83    | 79.94 ± 0.60    | 86.85 ± 0.91 | 77.45 ± 0.54 |      |
 
+More recent results on more datasets can be found in the [`hmLeaderboard`](https://huggingface.co/spaces/hmbench/hmLeaderboard).
+
 # Acknowledgements
 
 We thank [Luisa März](https://github.com/LuisaMaerz), [Katharina Schmid](https://github.com/schmika) and