execute: make clear what reset_terminal_fd()'s 2nd param is about

src/core/exec-invoke.c

@@ -716,7 +716,7 @@ static int setup_confirm_stdio(
         if (r < 0)
                 return r;
 
-        r = reset_terminal_fd(fd, true);
+        r = reset_terminal_fd(fd, /* switch_to_text= */ true);
         if (r < 0)
                 return r;
 

src/core/execute.c

@@ -169,7 +169,7 @@ void exec_context_tty_reset(const ExecContext *context, const ExecParameters *p)
                 (void) terminal_vhangup_fd(fd);
 
         if (context->tty_reset)
-                (void) reset_terminal_fd(fd, true);
+                (void) reset_terminal_fd(fd, /* switch_to_text= */ true);
 
         if (p && p->stdin_fd >= 0)
                 (void) exec_context_apply_tty_size(context, p->stdin_fd, path);