String: include in auto-downloads -> download automatically (#8599)

### Description

Update string value: `include in auto-downloads` -> `download
automatically`. This keeps getting translated in very cumbersome way (by
different people). That's maybe a sign that the source string is
cumbersome as well.

### Checklist
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ui/i18n/src/main/res/values/strings.xml

@@ -142,7 +142,7 @@
     <string name="shownotes_contentdescription">swipe up to read shownotes</string>
     <string name="close_label">Close</string>
     <string name="retry_label">Retry</string>
-    <string name="auto_download_label">Include in auto downloads</string>
+    <string name="auto_download_label">Download automatically</string>
     <string name="feed_volume_adapdation">Volume adaptation</string>
     <string name="feed_volume_adaptation_summary">Turn volume for episodes of this podcast up or down: %1$s</string>
     <string name="feed_volume_reduction_off">No adaption</string>