[clang][NFC] Fix a few malformed links

Author: danix800

clang/docs/ReleaseNotes.rst

@@ -149,7 +149,7 @@ Improvements to Clang's diagnostics
   (`#56035: <https://github.com/llvm/llvm-project/issues/56035>`_).
 - Clang constexpr evaluator now diagnoses compound assignment operators against
   uninitialized variables as a read of uninitialized object.
-  (`#51536 <https://github.com/llvm/llvm-project/issues/51536>_`)
+  (`#51536 <https://github.com/llvm/llvm-project/issues/51536>`_)
 - Clang's ``-Wfortify-source`` now diagnoses ``snprintf`` call that is known to
   result in string truncation.
   (`#64871: <https://github.com/llvm/llvm-project/issues/64871>`_).
@@ -163,10 +163,10 @@ Bug Fixes in This Version
   module may end up with members associated with the wrong declaration of the
   class, which can result in miscompiles in some cases.
 - Fix crash on use of a variadic overloaded operator.
-  (`#42535 <https://github.com/llvm/llvm-project/issues/42535>_`)
+  (`#42535 <https://github.com/llvm/llvm-project/issues/42535>`_)
 - Fix a hang on valid C code passing a function type as an argument to
   ``typeof`` to form a function declaration.
-  (`#64713 <https://github.com/llvm/llvm-project/issues/64713>_`)
+  (`#64713 <https://github.com/llvm/llvm-project/issues/64713>`_)
 - Clang now reports missing-field-initializers warning for missing designated
   initializers in C++.
   (`#56628 <https://github.com/llvm/llvm-project/issues/56628>`_)
@@ -222,7 +222,7 @@ Bug Fixes to C++ Support
 - Expressions producing ``nullptr`` are correctly evaluated
   by the constant interpreter when appearing as the operand
   of a binary comparison.
-  (`#64923 <https://github.com/llvm/llvm-project/issues/64923>_``)
+  (`#64923 <https://github.com/llvm/llvm-project/issues/64923>`_)
 
 - Fix a crash when an immediate invocation is not a constant expression
   and appear in an implicit cast.