Updates to Default App Versions

Be sure to run with a replica count of `1` for the upgrade!

- `files_antivirus` (`2.0.1` -> `2.1.1`)
- `files_automatedtagging` (`1.6.0` -> `1.5.0`) **DOWNGRADE** since 1.6.0 is not actually compatible with 15.x
- `music` (`0.9.4` -> `0.9.5`)
- `ownbackup` (`18.11.10` -> `19.5.0`)
- `owncloud-checksum` (`0.4.2` -> `0.4.3`)
- `user_external` (`0.6.1` -> `0.6.3`)
- `user_saml` (`2.2.0` -> `2.3.1`)

nextcloud-aks/config.example.env

@@ -111,16 +111,16 @@ NEXTCLOUD_ADMIN_PASSWORD="NextcloudAdminPassword"
 # available in the deployed image.
 #
 NEXTCLOUD_CUSTOM_APPS=(
-    'https://github.com/nextcloud/files_antivirus/releases/download/v2.0.1/files_antivirus.tar.gz'
-    'https://github.com/nextcloud/files_automatedtagging/releases/download/v1.6.0/files_automatedtagging-1.6.0.tar.gz'
+    'https://github.com/nextcloud/files_antivirus/releases/download/v2.1.1/files_antivirus.tar.gz'
+    'https://github.com/nextcloud/files_automatedtagging/releases/download/v1.5.0/files_automatedtagging-1.5.0.tar.gz'
     'https://github.com/nextcloud/files_downloadactivity/releases/download/v1.4.0/files_downloadactivity-1.4.0.tar.gz'
     'https://github.com/nextcloud/files_rightclick/releases/download/v0.13.0/files_rightclick.tar.gz'
-    'https://github.com/paulijar/music/files/2980042/music_0.9.4_nc-signed.tar.gz'
+    'https://github.com/paulijar/music/files/3124325/music_0.9.5_nc-signed.tar.gz'
     'https://github.com/gino0631/nextcloud-metadata/releases/download/v0.9.0/metadata.tar.gz'
-    'https://github.com/pbek/ownbackup/releases/download/18.11.0/ownbackup-nc.tar.gz'
-    'https://github.com/westberliner/owncloud-checksum/releases/download/v0.4.2/checksum.tar.gz'
-    'https://github.com/nextcloud/user_external/releases/download/v0.6.1/user_external-0.6.1.tar.gz'
-    'https://github.com/nextcloud/user_saml/releases/download/v2.2.0/user_saml-2.2.0.tar.gz'
+    'https://github.com/pbek/ownbackup/releases/download/19.5.0/ownbackup-nc.tar.gz'
+    'https://github.com/westberliner/owncloud-checksum/releases/download/v0.4.3/checksum.tar.gz'
+    'https://github.com/nextcloud/user_external/releases/download/v0.6.3/user_external-0.6.3.tar.gz'
+    'https://github.com/nextcloud/user_saml/releases/download/v2.3.1/user_saml-2.3.1.tar.gz'
 )
 
 ##