refactor: (if|when)-let -> (if|when)-let*

With the former macros' future in the air (and likely to be targeted in
future, potentially breaking changes), I'll deal with this now than have
it bite me later.

Ref: https://lists.gnu.org/archive/html/emacs-devel/2024-10/msg00637.html

modules/emacs/dired/config.el

@@ -32,7 +32,7 @@
       ;; Use GNU ls as `gls' from `coreutils' if available. Add `(setq
       ;; dired-use-ls-dired nil)' to your config to suppress the Dired warning
       ;; when not using GNU ls.
-      (if-let (gls (executable-find "gls"))
+      (if-let* ((gls (executable-find "gls")))
           (setq insert-directory-program gls)
         ;; BSD ls doesn't support -v or --group-directories-first
         (setq args (list (car args)))))

modules/emacs/ibuffer/autoload/workspaces.el

@@ -20,10 +20,10 @@
   (let ((buf (ibuffer-current-buffer t)))
     (unless (buffer-live-p buf)
       (user-error "Not a valid or live buffer: %s" buf))
-    (if-let (workspaces
-             (cl-loop for wk in (+workspace-list)
-                      if (+workspace-contains-buffer-p buf wk)
-                      collect wk))
+    (if-let* ((workspaces
+               (cl-loop for wk in (+workspace-list)
+                        if (+workspace-contains-buffer-p buf wk)
+                        collect wk)))
         (+workspace-switch
          (if (and (not select-first) (cdr workspaces))
              (or (completing-read "Select workspace: " (mapcar #'persp-name workspaces))