Fix inconsistent reference with "05" in the name of AI.
gcc/ada/
* doc/gnat_rm/implementation_of_ada_2012_features.rst
(AI-0216): Fix index reference.
* gnat_rm.texi: Regenerate.
RM References: B.01 (17) B.03 (62) B.03 (71.1/2)
-.. index:: AI05-0216 (Ada 2012 feature)
+.. index:: AI-0216 (Ada 2012 feature)
* *AI-0216 No_Task_Hierarchy forbids local tasks (0000-00-00)*
RM References: B.01 (17) B.03 (62) B.03 (71.1/2)
@end itemize
-@geindex AI05-0216 (Ada 2012 feature)
+@geindex AI-0216 (Ada 2012 feature)
@itemize *