docs: update URLs from stainlessapi.com to stainless.com (#316)

More details at https://www.stainless.com/changelog/stainless-com

SECURITY.md

@@ -2,9 +2,9 @@
 
 ## Reporting Security Issues
 
-This SDK is generated by [Stainless Software Inc](http://stainlessapi.com). Stainless takes security seriously, and encourages you to report any security vulnerability promptly so that appropriate action can be taken.
+This SDK is generated by [Stainless Software Inc](http://stainless.com). Stainless takes security seriously, and encourages you to report any security vulnerability promptly so that appropriate action can be taken.
 
-To report a security issue, please contact the Stainless team at security@stainlessapi.com.
+To report a security issue, please contact the Stainless team at security@stainless.com.
 
 ## Responsible Disclosure
 

counterparty_test.go

@@ -83,7 +83,7 @@ func TestCounterpartyNewWithOptionalParams(t *testing.T) {
 				PaymentType:       moderntreasury.F(moderntreasury.CounterpartyNewParamsAccountsRoutingDetailsPaymentTypeACH),
 			}}),
 		}}),
-		Email:      moderntreasury.F("dev@stainlessapi.com"),
+		Email:      moderntreasury.F("dev@stainless.com"),
 		LedgerType: moderntreasury.F(moderntreasury.CounterpartyNewParamsLedgerTypeCustomer),
 		LegalEntity: moderntreasury.F(moderntreasury.CounterpartyNewParamsLegalEntity{
 			LegalEntityType: moderntreasury.F(moderntreasury.CounterpartyNewParamsLegalEntityLegalEntityTypeBusiness),
@@ -296,7 +296,7 @@ func TestCounterpartyUpdateWithOptionalParams(t *testing.T) {
 		context.TODO(),
 		"id",
 		moderntreasury.CounterpartyUpdateParams{
-			Email:         moderntreasury.F("dev@stainlessapi.com"),
+			Email:         moderntreasury.F("dev@stainless.com"),
 			LegalEntityID: moderntreasury.F("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e"),
 			Metadata: moderntreasury.F(map[string]string{
 				"foo": "string",
@@ -332,7 +332,7 @@ func TestCounterpartyListWithOptionalParams(t *testing.T) {
 		AfterCursor:         moderntreasury.F("after_cursor"),
 		CreatedAtLowerBound: moderntreasury.F(time.Now()),
 		CreatedAtUpperBound: moderntreasury.F(time.Now()),
-		Email:               moderntreasury.F("dev@stainlessapi.com"),
+		Email:               moderntreasury.F("dev@stainless.com"),
 		LegalEntityID:       moderntreasury.F("legal_entity_id"),
 		Metadata: moderntreasury.F(map[string]string{
 			"foo": "string",