[clang] [clang][NFC] Fix typos in clang release notes (PR #166064)

[Amr Hesham via cfe-commits]

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@@ -350,7 +350,7 @@ Improvements to Clang's diagnostics
   potential misaligned members get processed before they can get discarded.
   (#GH144729)
 
-- Clang now emits dignostic with correct message in case of assigning to const reference captured in lambda. (#GH105647)
+- Clang now emits diagnostic with correct message in case of assigning to const reference captured in lambda. (#GH105647)
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AmrDeveloper wrote:

Thank you, I updated it 👍🏻 

https://github.com/llvm/llvm-project/pull/166064