Update README.md

Zefile8 · web-flow · commit 2a0097fc7649 · 2022-04-26T23:29:11.000+02:00
diff --git a/README.md b/README.md
@@ -20,6 +20,7 @@ List of expressions recognized so far:
 - (quick effect):
 - from your deck to your hand
 - except "
+- special summon
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