[lldb][docs] Add link to LoongArch tracking issue

#112693 will be
tracking the overall state of LoongArch support.

This means anyone can check without having to track down
an expert.

Author: DavidSpickett

lldb/docs/index.rst

@@ -81,9 +81,11 @@ are welcome:
 expected to work, with functionality improving rapidly. ARM and AArch64 support
 is more experimental, with more known issues than the others.
 
-RISC-V support is in active development, refer to the
-`tracking issue <https://github.com/llvm/llvm-project/issues/55383>`_
-for the current status.
+Support for the following architectures is in active development. For their
+current state, follow the links to their respective issues:
+
+* `RISC-V <https://github.com/llvm/llvm-project/issues/55383>`_
+* `LoongArch <https://github.com/llvm/llvm-project/issues/112693>`_
 
 Get Involved
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