Fix remaining convertable typos in docs and test comments

Co-authored-by: damyanp <[email protected]>

Author: Copilot

docs/YamlIO.rst

@@ -730,7 +730,7 @@ it is parsed. This allows dynamic types of nodes.  But the YAML I/O model uses
 static typing, so there are limits to how you can use tags with the YAML I/O
 model. Recently, we added support to YAML I/O for checking/setting the optional 
 tag on a map. Using this functionality it is even possbile to support different 
-mappings, as long as they are convertable.  
+mappings, as long as they are convertible.  
 
 To check a tag, inside your mapping() method you can use io.mapTag() to specify
 what the tag should be.  This will also add that tag when writing yaml.

test/Transforms/SROA/basictest.ll

@@ -1270,7 +1270,7 @@ define void @PR15674(i8* %data, i8* %src, i32 %size) {
 ; Arrange (via control flow) to have unmerged stores of a particular width to
 ; an alloca where we incrementally store from the end of the array toward the
 ; beginning of the array. Ensure that the final integer store, despite being
-; convertable to the integer type that we end up promoting this alloca toward,
+; convertible to the integer type that we end up promoting this alloca toward,
 ; doesn't get widened to a full alloca store.
 ; CHECK-LABEL: @PR15674(
 

tools/clang/test/SemaCXX/vector.cpp

@@ -184,7 +184,7 @@ void test_implicit_conversions(bool Cond, char16 c16, longlong16 ll16,
   (void)(Cond? to_c16 : to_c16e);
   (void)(Cond? to_ll16e : to_ll16);
 
-  // These 2 are convertable with -flax-vector-conversions (default)
+  // These 2 are convertible with -flax-vector-conversions (default)
   (void)(Cond? to_c16 : to_ll16);
   (void)(Cond? to_c16e : to_ll16e);
 }