[docs] Update release notes for APX relocation types (llvm#118575)

Author: fzou1

lld/docs/ReleaseNotes.rst

@@ -35,6 +35,11 @@ ELF Improvements
   globally changing the semantics of section matching. It also independently
   increases the expressive power of linker scripts.
   (`#95323 <https://github.com/llvm/llvm-project/pull/95323>`_)
+* Supported relocation types for x86-64 target:
+  * ``R_X86_64_CODE_4_GOTPCRELX`` (`#109783 <https://github.com/llvm/llvm-project/pull/109783>`_) (`#116737 <https://github.com/llvm/llvm-project/pull/116737>`_)
+  * ``R_X86_64_CODE_4_GOTTPOFF`` (`#116634 <https://github.com/llvm/llvm-project/pull/116634>`_)
+  * ``R_X86_64_CODE_4_GOTPC32_TLSDESC`` (`#116909 <https://github.com/llvm/llvm-project/pull/116909>`_)
+  * ``R_X86_64_CODE_6_GOTTPOFF``  (`#117675 <https://github.com/llvm/llvm-project/pull/117675>`_)
 
 Breaking changes
 ----------------

llvm/docs/ReleaseNotes.md

@@ -269,6 +269,13 @@ Changes to the X86 Backend
 
 * Supported ``-mcpu=diamondrapids``
 
+* Supported emitting relocation types for x86-64 target:
+  * `R_X86_64_CODE_4_GOTPCRELX`
+  * `R_X86_64_CODE_4_GOTTPOFF`
+  * `R_X86_64_CODE_4_GOTPC32_TLSDESC`
+  * `R_X86_64_CODE_6_GOTTPOFF`
+
+
 Changes to the OCaml bindings
 -----------------------------