Update environment type production back to sandbox after checking if production certificate pin was still correct

Author: Patrick

src/test/java/com/bunq/sdk/BunqSdkTestBase.java

@@ -92,7 +92,7 @@ protected static ApiContext getApiContext() {
         } else {
             SandboxUserPerson sandboxUser = generateNewSandboxUser();
             ApiContext apiContext = ApiContext.create(
-                    ApiEnvironmentType.PRODUCTION,
+                    ApiEnvironmentType.SANDBOX,
                     sandboxUser.getApiKey(),
                     DEVICE_DESCRIPTION
             );