add a missing dash to the release notes
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 5d2314b..8330940 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -78,7 +78,7 @@
- ``-Wbitwise-op-parentheses`` and ``-Wlogical-op-parentheses`` are disabled by default.
-- The new warnings ``Wc99-designator`` and ``-Wreorder-init-list`` warn about
+- The new warnings ``-Wc99-designator`` and ``-Wreorder-init-list`` warn about
uses of C99 initializers in C++ mode for cases that are valid in C99 but not
in C++20.
