Update NFC help

OpenPGP-Keychain/src/main/res/raw/help_nfc_beam.html

@@ -7,7 +7,7 @@ And don't add newlines before or after p tags because of transifex -->
 <body>
 <h2>How to receive keys</h2>
 <ol>
-<li>Go to your partners 'Manage Public Keys' and long press on the key you want to share.</li>
+<li>Go to your partners contacts and open the contact you want to share.</li>
 <li>Hold the two devices back to back (they have to be almost touching) and you’ll feel a vibration.</li>
 <li>After it vibrates you’ll see the content on your partners device turn into a card-like object with Star Trek warp speed-looking animation in the background.</li>
 <li>Tap the card and the content will then load on the your device.</li>