Fix version example typo

netch80 · netch80 · commit 5ac5ac1e1edc · 2026-02-15T08:57:45.000+02:00
The descriptive part defines `rc` but not `c` as
possible value of this suffix.
diff --git a/source/specifications/version-specifiers.rst b/source/specifications/version-specifiers.rst
@@ -590,8 +590,8 @@ and post-releases for minor corrections::
     1.0.dev2
     1.0.dev3
     1.0.dev4
-    1.0c1
-    1.0c2
+    1.0rc1
+    1.0rc2
     1.0
     1.0.post1
     1.1.dev1

-Original file line number
+Diff line change
 .0.dev2
 .0.dev3
 .0.dev4
 -    1.0c1
 -    1.0c2
 +    1.0rc1
 +    1.0rc2
 .0
 .0.post1
 .1.dev1