add QuietMisdreavus to Clang/ExtractAPI code owners (#115206)

Adding myself to the ExtractAPI code owners listing so i can participate
in code reviews.

Author: QuietMisdreavus

.github/CODEOWNERS

@@ -141,7 +141,7 @@
 /clang/tools/clang-installapi/ @cyndyishida
 
 # ExtractAPI
-/clang/**/ExtractAPI @daniel-grumberg
+/clang/**/ExtractAPI @daniel-grumberg @QuietMisdreavus
 
 # DWARFLinker, dwarfutil, dsymutil
 /llvm/**/DWARFLinker/ @JDevlieghere