upgrade prosemirror-tables to 1.6.3 (#6073)

* upgrade prosemirror-tables to 1.6.3

* added changeset

Author: bdbch

.changeset/tricky-apples-design.md

@@ -0,0 +1,6 @@
+---
+"@tiptap/pm": patch
+"tiptap-demos": patch
+---
+
+Upgraded prosemirror-tables to 1.6.3 to fix cells being resizable while the editor is uneditable

package-lock.json

@@ -140,7 +140,7 @@
     "prosemirror-schema-basic": "^1.2.3",
     "prosemirror-schema-list": "^1.4.1",
     "prosemirror-state": "^1.4.3",
-    "prosemirror-tables": "^1.6.1",
+    "prosemirror-tables": "^1.6.3",
     "prosemirror-trailing-node": "^3.0.0",
     "prosemirror-transform": "^1.10.2",
     "prosemirror-view": "^1.37.0"