Add result chart to Readme.md

With SVG chart produced by performance_chart.R.

Could also be done automatically via CI workflow pushed to gh-pages or some assets branch, but that would be overkill in this case, I guess, also since the result table is not automatic.
diff --git a/Readme.md b/Readme.md
index 122a119..72a9b9c 100644
--- a/Readme.md
+++ b/Readme.md
@@ -177,6 +177,10 @@
 
 \*\* No GPU acceleration tested.
 
+### Result chart
+
+![Tokenizer performance chart](https://user-images.githubusercontent.com/11092081/169690936-2e5df3c8-bdd3-4c91-bea8-8c8d6800c194.svg)
+
 ## Literature
 
 - Beesley, K. R./Karttunen, L. (2003): Finite State Morphology. CSLI Publications.