Update language-support.md

Add de-DE for PA

Author: sally-baolian

articles/cognitive-services/Speech-Service/language-support.md

@@ -925,6 +925,7 @@ The following table lists the released languages and public preview languages.
 |English (United Kingdom)|`en-GB`<sup>Public preview</sup> |
 |English (United States)|`en-US`<sup>General available</sup>|
 |French (France)|`fr-FR`<sup>Public preview</sup> |
+|German (Germany)|`de-DE`<sup>Public preview</sup> |
 |Spanish (Spain)|`es-ES`<sup>Public preview</sup> |
 
 > [!NOTE]