Fix #36: Release times are interpreted as local times instead of UTC

Caused by the time from the GitHub releases not having specified what kind it is, which meant that C# interpreted it as if it was local time.

Author: Gymnasiast

src/IntelOrca.OpenLauncher.Core/BuildService.cs

@@ -55,8 +55,11 @@ public async Task<Build> GetLatestBuildAsync(RepositoryName repo, bool isRelease
             return GetBuild(release, isRelease);
         }
 
-        private static Build GetBuild(Release release, bool isRelease) =>
-            new Build(isRelease, release.PublishedAt?.DateTime ?? DateTime.MinValue, release.TagName, GetAssets(release));
+        private static Build GetBuild(Release release, bool isRelease)
+        {
+            var date = DateTime.SpecifyKind(release.PublishedAt?.DateTime ?? DateTime.MinValue, DateTimeKind.Utc);
+            return new Build(isRelease, date, release.TagName, GetAssets(release));
+        }
 
         private static ImmutableArray<BuildAsset> GetAssets(Release release) =>
             release.Assets