update core-rust

deltachat-ios/Info.plist

@@ -17,7 +17,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.3.0</string>
+	<string>0.3.1</string>
 	<key>CFBundleURLTypes</key>
 	<array>
 		<dict>

deltachat-ios/libraries/deltachat-core-rust

@@ -1 +1 @@
-Subproject commit c7c86f1b038077365e6d634772eea63a9759228e
+Subproject commit 692b779896fe479ba4d53b09d36998fec85fd0bd