Update wss addresses in light client wasm README #699

Job	Run time
Checks / Format	11s
Checks / Clippy	8m 39s
Tests / Build & Test (Wasm)	4m 9s
Tests / Build & Test (ubuntu-latest)	13m 51s
Tests / Build & Test (windows-2022)	16m 31s
Tests / Build & Test (macos-latest)	14m 16s
Code Coverage	0s
	57m 37s

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