add supported weather sources to full_description.txt

fastlane/metadata/android/en-US/full_description.txt

@@ -2,4 +2,14 @@
 <p><br><b>Features:</b></p>
 <br>
 <br>
-<p>Features both the Pixel Weather-inspired design and the original Froggy style, with summaries, multiple weather and search providers, personalization options, and more.</p>
+<p>Features both the Pixel Weather-inspired design and the original Froggy style, with summaries, multiple weather and search providers, personalization options, and more.</p>
+<br>
+<p><b>Supported weather sources: </b></p>
+
+- Open Meteo
+- Met Norway
+- National Weather Service (NWS)
+- SMHI
+- DWD
+- Meteo-France
+- And more to be added