chore(github): mark demo as non-detectable

Author: eliandoran

.gitattributes

@@ -3,7 +3,7 @@ package-lock.json linguist-generated=true
 
 apps/server/src/assets/doc_notes/en/User[[:space:]]Guide/** linguist-generated=true linguist-vendored
 apps/server/src/assets/doc_notes/en/User[[:space:]]Guide/**/*.html eol=lf
-apps/edit-docs/demo/** linguist-vendored
+apps/edit-docs/demo/** -linguist-detectable
 
 docs/**/*.md eol=lf
 docs/**/*.json eol=lf