Xray German translation for Test Plan is incorrect

Description:
When using the German language version and navigating to a Test Execution, the sidebar link to the associated Test Plan displays the incorrect name "Test Plane", which is not a valid German word (see image below).

Steps to reproduce

1. Set the application language to German (DE).
2. Open any Test Execution.
3. Observe the sidebar navigation link that points to the associated Test Plan.

Expected result: "Testplan" (Correct singular form)

Actual result: "Testplan" (Not a valid German word)

Additional notes:
The correct German translation for the singular "Test Plan" is "Testplan" (one word, no space). The plural would be "Testpläne" (with an umlaut).