fix(marks): mark winline as invalid if change is in a concealed line (#32766)

Code that checks whether a `w_lines` entry has become invalid due to
a change in a folded line should now also check for concealed lines.

src/nvim/buffer_defs.h

@@ -810,8 +810,8 @@ struct tabpage_S {
 typedef struct {
   linenr_T wl_lnum;             // buffer line number for logical line
   uint16_t wl_size;             // height in screen lines
-  char wl_valid;                // true values are valid for text in buffer
-  char wl_folded;               // true when this is a range of folded lines
+  bool wl_valid;                // true values are valid for text in buffer
+  bool wl_folded;               // true when this is a range of folded lines
   linenr_T wl_foldend;          // last buffer line number for folded line
   linenr_T wl_lastlnum;         // last buffer line number for logical line
 } wline_T;