consistent style for urls

bookwyrm/templates/snippets/follow_request_buttons.html

@@ -1,11 +1,11 @@
 {% load fr_display %}
 {% if request.user|follow_request_exists:user %}
-<form action="/accept_follow_request/" method="POST">
+<form action="/accept-follow-request/" method="POST">
     {% csrf_token %}
     <input type="hidden" name="user" value="{{ user.username }}">
     <button class="button is-primary is-small" type="submit">Accept</button>
 </form>
-<form action="/delete_follow_request/" method="POST">
+<form action="/delete-follow-request/" method="POST">
     {% csrf_token %}
     <input type="hidden" name="user" value="{{ user.username }}">
     <button class="button is-danger is-light is-small" type="submit" class="warning">Delete</button>