Update README.md

Resolve emoji assymetry

README.md

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 # Wormhole
 
-⚠️ **WORK IN PROGRESS — UNAUDITED, DO NOT USE.** ⚠
+⚠️ **WORK IN PROGRESS — UNAUDITED, DO NOT USE.** ⚠️
 
 See [DEVELOP.md](DEVELOP.md) for instructions on how to set up a local devnet.