Add release note

Author: justinyoo

release-notes/v1.0.0.md

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+## Release Notes ##
+
+🎉🎉🎉 General Availability of Azure Functions OpenAPI Extension `v1.0.0` 🎉🎉🎉
+
+
+### Changes & Fixes ###
+
+* #308 Fix the API prefix overly trimmed #307
+* #288 Uint16 bug fix
+* #287 Fix uint32 error
+* #268 Fixed throwing StackOverflowException when contains exception class #251
+* #263 Fix Data Member Attribute json Serialized Model Casing Applied #212
+* #260 Add integration testing for Uri Object Type #143