org.el (org-speed-commands-default): Use ":" instead of ";" for `org-set-tags-command'

* org.el (org-speed-commands-default): Use ":" instead of ";"
for `org-set-tags-command', which is consistent with ":" in
agenda view.  Use "=" for `org-columns".

Thanks to Alan Schmitt for pointing this.

lisp/org.el

@@ -18068,7 +18068,7 @@ BEG and END default to the buffer boundaries."
     ("c" . org-cycle)
     ("C" . org-shifttab)
     (" " . org-display-outline-path)
-    (":" . org-columns)
+    ("=" . org-columns)
     ("Outline Structure Editing")
     ("U" . org-shiftmetaup)
     ("D" . org-shiftmetadown)
@@ -18093,7 +18093,7 @@ BEG and END default to the buffer boundaries."
     ("1" . (org-priority ?A))
     ("2" . (org-priority ?B))
     ("3" . (org-priority ?C))
-    (";" . org-set-tags-command)
+    (":" . org-set-tags-command)
     ("e" . org-set-effort)
     ("E" . org-inc-effort)
     ("W" . (lambda(m) (interactive "sMinutes before warning: ")