Fix typo in open file

[sbrunner]

No description provided.

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: geoportal/c2cgeoportal_geoportal/views/entry.py

Function	Unhandled Issue
custom_view	FileNotFoundError: [Errno 2] No such file or directory: '/etc/static-frontend/desktop.html' ... Event Count: 4
custom_view	TypeError: object of type 'builtin_function_or_method' has no len() ... Event Count: 2

---

_{Did you find this useful? React with a 👍 or 👎}