Update 3.0.md

Author: olydis

versions/3.0.md

@@ -3514,7 +3514,7 @@ Lists the required security schemes to execute this operation.
 The name used for each property MUST correspond to a security scheme declared in the [Security Schemes](#componentsSecuritySchemes) under the [Components Object](#componentsObject).
 
 Security Requirement Objects that contain multiple schemes require that all schemes MUST be satisfied for a request to be authorized.
-This enables support for scenarios where there multiple query parameters or HTTP headers are required to convey security information.
+This enables support for scenarios where multiple query parameters or HTTP headers are required to convey security information.
 
 When a list of Security Requirement Objects is defined on the [Open API object](#oasObject) or [Operation Object](#operationObject), only one of Security Requirement Objects in the list needs to be satisfied to authorize.