fix: API tokens use the mos_ prefix [CI]

backend/tests/MoShiro.Backend.Tests/ApiBasicsTests.cs

@@ -139,7 +139,7 @@ public sealed class ApiBasicsTests
         Assert.Equal(HttpStatusCode.OK, read.StatusCode);
 
         using HttpClient bogus = _backend.NewClient();
-        bogus.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "mon_bogus");
+        bogus.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "mos_bogus");
         using HttpResponseMessage unknown = await bogus.GetAsync("/api/admin/agents");
         Assert.Equal(HttpStatusCode.Unauthorized, unknown.StatusCode);
     }