Add IFRS in bibliography

docs/source/refs.bib

@@ -669,6 +669,13 @@
     url="https://www.w3.org/TR/2018/REC-activitypub-20180123/",
     year=2018
 }
+@misc{IFRS,
+    title="IFRS Conceptual Framework for Financial Reporting",
+    url="https://www.ifrs.org/issued-standards/list-of-standards/conceptual-framework.html/content/dam/ifrs/publications/html-standards/english/2021/issued/cf/",,
+    author="IFRS",
+    publisher="IFRS",
+    year=2021
+}
 @misc{COGA-Usable,
     title="Making Content Usable for People with Cognitive and Learning Disabilities",
     author="Lisa Seeman-Horwitz and Rachael Bradley Montgomery and Steve Lee and Ruoxi Ran",