Update the 1.56.0 release header for consistency

cuviper · cuviper · commit a0cc8725e957 · 2021-10-13T11:10:00.000-07:00
diff --git a/RELEASES.md b/RELEASES.md
@@ -1,4 +1,4 @@
-Rust 1.56.0 (2021-10-21)
+Version 1.56.0 (2021-10-21)
 ========================
 
 Language
