[Clang] Fix error in Documentation introduced by 3784e8cc [nfc].

The documentation contained extra space.
Also remove llvm/llvm-project#54296
from the list of issues by 3784e8cc as this commit did not
fix it (nor was it supposed to).

clang/docs/ReleaseNotes.rst

@@ -84,11 +84,10 @@ Bug Fixes
   Fixes `Issue 28985 <https://github.com/llvm/llvm-project/issues/28985>`_.
 
 - Unevaluated lambdas in dependant contexts no longer result in clang crashing.
-  This fixes Issues `50376 < https://github.com/llvm/llvm-project/issues/50376>`_,
-  `54296 < https://github.com/llvm/llvm-project/issues/54296>`_,
-  `51414 < https://github.com/llvm/llvm-project/issues/51414>`_,
-  `51416 < https://github.com/llvm/llvm-project/issues/51416>`_,
-  and `51641 < https://github.com/llvm/llvm-project/issues/51641>`_.
+  This fixes Issues `50376 <https://github.com/llvm/llvm-project/issues/50376>`_,
+  `51414 <https://github.com/llvm/llvm-project/issues/51414>`_,
+  `51416 <https://github.com/llvm/llvm-project/issues/51416>`_,
+  and `51641 <https://github.com/llvm/llvm-project/issues/51641>`_.
 
 
 Improvements to Clang's diagnostics