BS-14460 typos in wizard "create contract inputs from document"

bundles/plugins/org.bonitasoft.studio.contract/messages.properties

@@ -93,4 +93,4 @@ warningAddFromData_noDocumentAvailable=Please select a Document in the list.
 defaultValueAlreadyDefinedWarning=The document {0} is already initialized. Create input from this document will overwrite the current value of {0} by the value of contract input.
 fileInputType=of type FILE
 openUpdateDocumentOperationWarningTitle=Update document operation generation
-openUpdateDocumentOperationWarningMessages=The contract input have been specified. Operations to set the value of document {0} with the contract input value will be generated. It can be viewed in the Operations pane.\nIf operation has already been generated for this input, it will not be replaced.
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+openUpdateDocumentOperationWarningMessages=The contract input has been specified. The operation to set the value of document {0} with the contract input value will be generated. It can be viewed in the Operations pane.\nIf operation has already been generated for this input, it will not be replaced.
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