Update README.md

README.md

@@ -362,7 +362,7 @@ A new Clojure wrapper has been created by [tomekw](https://github.com/tomekw) an
 
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-### Support <sup><sup>:speech_balloon:</sup></sup>
+### Support <sup><sup>&#128172;</sup></sup>
 Google discussion group [HikariCP here](https://groups.google.com/d/forum/hikari-cp), growing [FAQ](https://github.com/brettwooldridge/HikariCP/wiki/FAQ).
 
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