Fix description

Author: kgryte

lib/node_modules/@stdlib/assert/napi/is-type/README.md

@@ -20,7 +20,7 @@ limitations under the License.
 
 # Assert Type
 
-> Asserts that a Node-API value is a specified Node-API data type.
+> Assert that a Node-API value is a specified Node-API data type.
 
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