clang: fix typo availbility

- Fixes [[ https://github.com/llvm/llvm-project/issues/56787 | #56787 ]].

I am fixing the spelling of availability.

I am unsure if this change will have any side effects. If someone can
help on how to check if it has any side effects, I can test those out as
well.

Reviewed By: inclyc

Differential Revision: https://reviews.llvm.org/D131277

GitOrigin-RevId: a6cb8419b1757380e3c577477fdc2501484a7245
diff --git a/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp b/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp
index 6a88f8d..d1bf83c 100644
--- a/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp
+++ b/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp
@@ -494,7 +494,7 @@
   serializeObject(
       Obj, "location",
       serializeSourceLocation(Record.Location, /*IncludeFileURI=*/true));
-  serializeObject(Obj, "availbility",
+  serializeObject(Obj, "availability",
                   serializeAvailability(Record.Availability));
   serializeObject(Obj, "docComment", serializeDocComment(Record.Comment));
   serializeArray(Obj, "declarationFragments",