Disable notebook support for normal Clojure files

This is a work-around because currently Live Share causes
clojure files to always be opened as notebooks.

See:

#1850

package.json

@@ -2832,7 +2832,7 @@
         "priority": "option",
         "selector": [
           {
-            "filenamePattern": "*.{clj,cljc,cljs,cljx}"
+            "filenamePattern": "*.{cljnb,cljcnb,cljsnb,cljxnb}"
           }
         ]
       }