[LLVM] Update sanitizers maintainers (#119165)

Author: vitalybuka

llvm/Maintainers.md

@@ -95,15 +95,10 @@ [email protected], [email protected] (email), [chandlerc](https://github.co
 
 ### Instrumentation and sanitizers
 
-#### AddressSanitizer, ThreadSanitizer
+#### Sanitizers not covered by someone else
 
-Kostya Serebryany \
-[email protected] (email), [kcc](https://github.com/kcc) (GitHub)
-
-#### MemorySanitizer
-
-Evgeniy Stepanov \
-[email protected] (email), [eugenis](https://github.com/eugenis) (GitHub)
+Vitaly Buka \
+[email protected] (email), [vitalybuka](https://github.com/vitalybuka) (GitHub)
 
 #### NumericalStabilitySanitizer
 
@@ -467,6 +462,8 @@ Evan Cheng ([email protected]) -- Parts of code generator not covered by some
 Renato Golin ([email protected], [rengolin](https://github.com/rengolin)) -- ARM backend \
 Anton Korobeynikov ([email protected], [asl](https://github.com/asl)) -- ARM EABI \
 Hans Wennborg ([email protected], [zmodem](https://github.com/zmodem)) -- Release management \
+Kostya Serebryany ([kcc](https://github.com/kcc)) - Sanitizers
+Evgeniy Stepanov ([eugenis](https://github.com/eugenis)) - Sanitizers
 
 ### Former maintainers of removed components