update signer instantiation details

pages/sdk/protocol-kit/guides/safe-deployment/deploy-safe.mdx

@@ -48,7 +48,7 @@ First, you need to install the Protocol Kit.
 
   ### Create a signer
 
-  Firstly, you need to get a signer, this example uses a private key, but any way to get an `EIP-1193` compatible signer can be used.
+  You need a signer to instantiate the Protocol Kit. This example uses a private key to obtain a signer, but other `EIP-1193` compatible signers are also supported. For more detailed information on the available options, please refer to the [Protocol Kit reference](../../reference/safe.mdx#initialization).
 
   {/* <!-- vale off --> */}