fix README.md (ethereum#31076)

Hi
I fixed 2 minor spelling issues.

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Co-authored-by: lightclient <[email protected]>

Author: 2 people

README.md

@@ -178,7 +178,7 @@ HTTP based JSON-RPC API options:
   * `--http.addr` HTTP-RPC server listening interface (default: `localhost`)
   * `--http.port` HTTP-RPC server listening port (default: `8545`)
   * `--http.api` API's offered over the HTTP-RPC interface (default: `eth,net,web3`)
-  * `--http.corsdomain` Comma separated list of domains from which to accept cross origin requests (browser enforced)
+  * `--http.corsdomain` Comma separated list of domains from which to accept cross-origin requests (browser enforced)
   * `--ws` Enable the WS-RPC server
   * `--ws.addr` WS-RPC server listening interface (default: `localhost`)
   * `--ws.port` WS-RPC server listening port (default: `8546`)