completion/selectrum -> completion/vertico, part 2

- Rename module from `:completion selectrum` to `:completion vertico`
- Rename all files involved
- Do *not* yet rename all the functions, as that messes up git's rename
  detection.

modules/checkers/spell/README.org

@@ -46,7 +46,7 @@ This module has no dedicated maintainers.
   + [[https://github.com/d12frosted/flyspell-correct][flyspell-correct]]
   + [[https://github.com/d12frosted/flyspell-correct#flyspell-correct-ivy-interface][flyspell-correct-ivy]] (=completion/ivy=)
   + [[https://github.com/d12frosted/flyspell-correct#flyspell-correct-helm-interface][flyspell-correct-helm]] (=completion/helm=)
-  + [[https://github.com/d12frosted/flyspell-correct#flyspell-correct-popup-interface][flyspell-correct-popup]] (if *neither* =completion/ivy=, =completion/helm= or =completion/selectrum=)
+  + [[https://github.com/d12frosted/flyspell-correct#flyspell-correct-popup-interface][flyspell-correct-popup]] (if *neither* =completion/ivy=, =completion/helm= or =completion/vertico=)
   + [[https://github.com/rolandwalker/flyspell-lazy][flyspell-lazy]]
 + else
   + [[https://gitlab.com/ideasman42/emacs-spell-fu][spell-fu]]

modules/checkers/spell/autoload/+spell-fu.el

@@ -63,7 +63,7 @@
     (ispell-accept-buffer-local-defs))
   (if (not (or (featurep! :completion ivy)
                (featurep! :completion helm)
-               (featurep! :completion selectrum)))
+               (featurep! :completion vertico)))
       (call-interactively #'ispell-word)
     (cl-destructuring-bind (start . end)
         (or (bounds-of-thing-at-point 'word)

modules/checkers/spell/config.el

@@ -234,7 +234,7 @@ e.g. proselint and langtool."
                 (require 'flyspell-correct-helm nil t)))
           ((and (featurep! :completion ivy)
                 (require 'flyspell-correct-ivy nil t)))
-          ((featurep! :completion selectrum)) ; selectrum doesn't need any extra configuration
+          ((featurep! :completion vertico)) ; vertico doesn't need any extra configuration
           ((require 'flyspell-correct-popup nil t) ; only use popup if no compatible completion UI is enabled
            (setq flyspell-popup-correct-delay 0.8)
            (define-key popup-menu-keymap [escape] #'keyboard-quit))))

modules/checkers/spell/packages.el

@@ -8,6 +8,6 @@
          (package! flyspell-correct-ivy))
         ((featurep! :completion helm)
          (package! flyspell-correct-helm))
-        ((not (featurep! :completion selectrum))
+        ((not (featurep! :completion vertico))
          (package! flyspell-correct-popup)))
   (package! flyspell-lazy :pin "0fc5996bcee20b46cbd227ae948d343c3bef7339"))