add backquotes iRODSMeta

Author: d-w-moore

README.md

@@ -855,7 +855,7 @@ print(f"{current_metadata = }")
 
 Subclassing iRODSMeta
 ---------------------
-The keyword option `iRODSMeta_type` can be used to set up any iRODSMeta
+The keyword option `iRODSMeta_type` can be used to set up any `iRODSMeta`
 subclass as the translator between native iRODS metadata APIs
 and the way in which the AVUs thus conveyed should be represented to the
 client.