@errSetCast is renamed into @errorcast

Relates to ziglang/zig#17343

Author: krichprollsch

src/reflect.zig

@@ -908,7 +908,7 @@ pub const Struct = struct {
         // TODO: the type of the error should be the one define in the ErroSet field
         // instead here we accept anyerror, see comment on throwError generate function
         // So the implementation API should deal with that, knowing that the runtime
-        // error sent will be part of the ErrorSet (here an @errSetCast is possible)
+        // error sent will be part of the ErrorSet (here an @errorCast is possible)
         if (!isDecl(
             T,
             "init",

src/tests/types_complex_test.zig

@@ -104,7 +104,7 @@ pub const MyException = struct {
     };
 
     pub fn init(_: std.mem.Allocator, err: anyerror, _: []const u8) anyerror!MyException {
-        return .{ .err = @as(ErrorSet, @errSetCast(err)) };
+        return .{ .err = @as(ErrorSet, @errorCast(err)) };
     }
 
     pub fn get_name(self: MyException) []const u8 {