#17275: Fix class name in init errors in C bufferedio classes.

This fixes an apparent copy-and-paste error.

Original patch by Manuel Jacob.
diff --git a/Misc/NEWS b/Misc/NEWS
index a2f397c..a89a9a4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -9,6 +9,9 @@
 Core and Builtins
 -----------------
 
+- Issue #17275: Corrected class name in init error messages of the C version of
+  BufferedWriter and BufferedRandom.
+
 - Issue #7963: Fixed misleading error message that issued when object is
   called without arguments.