bpo-43927: Change 'IOError' to 'OSError' (GH-26289)

This is the last remaining instance, at least for this chapter, in 3.10 & 3.11.

Author: terryjreedy

Doc/tutorial/errors.rst

@@ -305,7 +305,7 @@ disabled by using ``from None`` idiom:
 
     >>> try:
     ...     open('database.sqlite')
-    ... except IOError:
+    ... except OSError:
     ...     raise RuntimeError from None
     ...
     Traceback (most recent call last):