docs: correct spelling errors across multiple packages (#25002)

crypto/keys/secp256k1/secp256k1_cgo.go

@@ -15,7 +15,7 @@ func (privKey *PrivKey) Sign(msg []byte) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
-	// we do not need v  in r||s||v:
+	// we do not need v in r||s||v:
 	rs := rsv[:len(rsv)-1]
 	return rs, nil
 }

crypto/keys/secp256r1/privkey.go

@@ -30,7 +30,7 @@ func (m *PrivKey) Type() string {
 	return name
 }
 
-// Sign hashes and signs the message usign ECDSA. Implements sdk.PrivKey interface.
+// Sign hashes and signs the message using ECDSA. Implements sdk.PrivKey interface.
 func (m *PrivKey) Sign(msg []byte) ([]byte, error) {
 	return m.Secret.Sign(msg)
 }