Fix typos in test method names for consistency

Author: clement911

HelpScoutSharp.Tests/MemberService_Tests.cs

@@ -19,7 +19,7 @@ public async Task Initialize()
     }
 
     [TestMethod]
-    public async Task LisTeamMembersAsync_Works()
+    public async Task ListTeamMembersAsync_Works()
     {
         var team = (await _teamService.ListAsync()).entities[0];
         var res = await _service.ListAsync(team.id);

HelpScoutSharp.Tests/TeamService_Tests.cs

@@ -17,7 +17,7 @@ public async Task Initialize()
     }
 
     [TestMethod]
-    public async Task LisTeamsAsync_Works()
+    public async Task ListTeamsAsync_Works()
     {
         var res = await _service.ListAsync();
         Assert.IsTrue(res.page.size > 0);