Update link for mobile app docs (#7378)

src/backend/InvenTree/InvenTree/version.py

@@ -104,7 +104,7 @@ def inventreeDocUrl():
 
 def inventreeAppUrl():
     """Return URL for InvenTree app site."""
-    return f'{inventreeDocUrl()}/app/app/'
+    return f'https://docs.inventree.org/app/'
 
 
 def inventreeCreditsUrl():

src/frontend/src/defaults/links.tsx

@@ -36,7 +36,7 @@ if (IS_DEV_OR_DEMO) {
 }
 
 export const docLinks = {
-  app: 'https://docs.inventree.org/en/latest/app/app/',
+  app: 'https://docs.inventree.org/app/',
   getting_started: 'https://docs.inventree.org/en/latest/getting_started/',
   api: 'https://docs.inventree.org/en/latest/api/api/',
   developer: 'https://docs.inventree.org/en/latest/develop/starting/',