fix typo in IG date

Author: JohnMoehrke

input/implementationguide-IHE.FormatCode.xml

@@ -18,7 +18,7 @@ ImplementationGuide for  <a href="https://wiki.ihe.net/index.php/IHE_Format_Code
 	<title value="IHE FormatCode Vocabulary" />
 	<status value="active" />
 	<experimental value="false" />
-	<date value="2020-22-07" />
+	<date value="2020-07-22" />
 	<publisher value="Integrating the Healthcare Enterprise (IHE)" />
 	<contact>
 		<name value="IHE" />