fix: allow 'doc-glossary' role on 'section' elements

Related HTML checker pull-request:
validator/validator#771

Author: mattgarrish

src/main/resources/com/adobe/epubcheck/schema/30/mod/html5/structural.rnc

@@ -45,6 +45,7 @@
 			|	common.attrs.aria.role.doc-errata
 			|	common.attrs.aria.role.doc-example
 			|	common.attrs.aria.role.doc-foreword
+			|	common.attrs.aria.role.doc-glossary
 			|	common.attrs.aria.role.doc-index
 			|	common.attrs.aria.role.doc-introduction
 			|	common.attrs.aria.role.doc-notice