Fix more absolute links.

Shogi.UI/Pages/FancyErrorPage.razor

@@ -6,7 +6,7 @@
             <h1 class="card-title">Oops!</h1>
             <p class="card-text">Something went wrong.</p>
             <p class="card-text">
-                <a href="/">Return to the home page</a>
+                <a href="">Return to the home page</a>
             </p>
         </div>
     </div>

Shogi.UI/Pages/Identity/LogoutPage.razor

@@ -10,7 +10,7 @@
 		</Authorized>
 		<NotAuthorized>
 			<p>Thanks for playing!</p>
-			<div class="alert alert-success">You're logged out. <a href="/login">Log in.</a></div>
+			<div class="alert alert-success">You're logged out. <a href="login">Log in.</a></div>
 		</NotAuthorized>
 	</AuthorizeView>
 </main>

Shogi.UI/Pages/Play/GameBrowser.razor

@@ -17,7 +17,7 @@
 			{
 					<row>
 						<div>
-							<a href="/play/@session.SessionId">@session.Player1</a>
+							<a href="play/@session.SessionId">@session.Player1</a>
 						</div>
 					@if (string.IsNullOrEmpty(session.Player2))
 					{