Update patches and ffmpeg in snap.

Telegram/build/release.py

@@ -250,6 +250,7 @@ files.append({
 })
 
 r = requests.get(url + 'repos/telegramdesktop/tdesktop/releases/tags/v' + version)
+
 if r.status_code == 404:
   print('Release not found, creating.')
   if commit == '':

snap/snapcraft.yaml

@@ -121,7 +121,7 @@ parts:
   patches:
     source: https://github.com/desktop-app/patches.git
     source-depth: 1
-    source-commit: 701cfb4b3d6612188d168f198c842114fd64726f
+    source-commit: 5c6549de54d24aa11bff0968b92fae06afe5b168
     plugin: nil
     override-pull: |
       craftctl default
@@ -162,7 +162,7 @@ parts:
   ffmpeg:
     source: https://github.com/FFmpeg/FFmpeg.git
     source-depth: 1
-    source-branch: n6.1.1
+    source-branch: n6.1.6
     plugin: autotools
     build-packages:
       - nasm