OAuth text updates

app/src/main/res/values/strings.xml

@@ -186,8 +186,8 @@
     <string name="title_setup_oauth" translatable="false">%1$s (OAuth)</string>
     <string name="title_setup_other">Other provider</string>
     <string name="title_setup_pop3">POP3 account</string>
-    <string name="title_setup_oauth_permission">The email provider has approved OAuth only for official app versions</string>
-    <string name="title_setup_gmail_support">Authorizing Google accounts will work in official versions only because Android checks the app signature</string>
+    <string name="title_setup_oauth_permission">The email provider has approved OAuth only for the Play Store and GitHub version</string>
+    <string name="title_setup_gmail_support">Authorizing Google accounts will work in the Play Store and GitHub version only because Android checks the digital app signature</string>
     <string name="title_setup_gmail_rationale">Please grant permissions to select an account and read your name</string>
     <string name="title_setup_gmail_permissions">Google will ask for permissions to read, compose, send and permanently delete all your email. FairEmail will never delete your messages without your explicit consent.</string>
     <string name="title_setup_gmail_drafts">If the drafts folder is not accessible by IMAP, this can be fixed in the Gmail label settings</string>

metadata/en-US/full_description.txt

@@ -1,6 +1,6 @@
 FairEmail is easy to set up and works with virtually all email providers, including Gmail, Outlook and Yahoo!
 
-<b>Note that OAuth was not approved for the F-Droid build. For this you'll need to use the Play store version or the GitHub release.</b>
+<b>Note that OAuth was not approved by Google, etc for the F-Droid build. For this you'll need to use the Play store version or the GitHub release.</b>
 
 FairEmail might be for you if you value your privacy.