Minor spelling change (#485)

Testing doing this via web tool, unclear how this will affect git flow

src/cryptoadvance/specter/templates/wallet/new_wallet/import_wallet.jinja

@@ -33,7 +33,7 @@
 		{% endif %}
 		{% if unknown_cosigners|length > 0 %}
 			<br>
-			<h1>Unknwon cosigners devices:</h1>
+			<h1>Unknown cosigners devices:</h1>
 			<p>These deivces will be added automatically to your list of devices. Click on a device to add information about it.</p>
 			<div class="row overflow">
 				{% for unknown_cosigner in unknown_cosigners %}
@@ -56,4 +56,4 @@
 		<input type="hidden" name="createwallet" value="true">
 		<button type="submit" name="action" value="importwallet" class="btn centered">Import Wallet</button>
 	</form>
-{% endblock %}
+{% endblock %}