Improve appstream file

This MR does the following:
- Change desktop ID to reverse DNS
- Clarify support for mouse and keyboard only

https://github.com/tenacityteam/tenacity/pull/695

Signed-off-by: TheEvilSkeleton <theevilskeleton@riseup.net>

help/org.tenacityaudio.Tenacity.metainfo.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <component type="desktop">
     <id>org.tenacityaudio.Tenacity</id>
-    <launchable type="desktop-id">tenacity.desktop</launchable>
+    <launchable type="desktop-id">org.tenacityaudio.Tenacity.desktop</launchable>
     <project_license>GPL-2.0-or-later</project_license>
     <!-- Metainfo licensed in CC0 1.0 -->
     <metadata_license>CC0-1.0</metadata_license>
@@ -41,4 +41,8 @@
     <update_contact>~tenacity/tenacity-discuss@lists.sr.ht</update_contact>
     <releases>
     </releases>
+    <supports>
+      <control>pointing</control>
+      <control>keyboard</control>
+    </supports>
 </component>