[LLVM] Update exception handling maintainer (llvm#120585)

Nominate rnk as the new maintainer for exception handling.

Author: nikic

llvm/Maintainers.md

@@ -436,8 +436,8 @@ [email protected] (email), [echristo](https://github.com/echristo) (GitHub)
 
 #### Exception handling
 
-Anton Korobeynikov \
-[email protected] (email), [asl](https://github.com/asl) (GitHub)
+Reid Kleckner \
+[email protected] (email), [rnk](https://github.com/rnk) (GitHub)
 
 #### LLVM Buildbot
 
@@ -493,7 +493,7 @@ Hal Finkel ([email protected], [hfinkel](https://github.com/hfinkel) -- AliasAnaly
 Renato Golin ([email protected], [rengolin](https://github.com/rengolin)) -- ARM backend \
 Venkatraman Govindaraju ([email protected], [vegovin](https://github.com/vegovin) -- Sparc backend \
 James Grosbach ([email protected]) -- MC layer \
-Anton Korobeynikov ([email protected], [asl](https://github.com/asl)) -- ARM EABI, Windows codegen \
+Anton Korobeynikov ([email protected], [asl](https://github.com/asl)) -- ARM EABI, Windows codegen, Exception handling \
 Benjamin Kramer ([email protected], [d0k](https://github.com/d0k)) -- DWARF Parser \
 David Majnemer ([email protected], [majnemer](https://github.com/majnemer)) -- InstCombine, ConstantFold \
 Tim Northover ([email protected], [TNorthover](https://github.com/TNorthover)) -- AArch64 backend \