Update X-Blink-Time-Zone header to use UTC

The code change updates the `X-Blink-Time-Zone` HTTP header value from "America/Los_Angeles" to "UTC". This means that the application will now use Coordinated Universal Time (UTC) instead of the Pacific Time Zone (America/Los_Angeles) for the `X-Blink-Time-Zone` header in its HTTP requests.

Author: bvdcode

Sources/Blink/BlinkClient.cs

@@ -108,7 +108,7 @@ private HttpClient CreateHttpClient(string baseUrl, string? token = "")
             _http.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", userAgent);
             _http.DefaultRequestHeaders.TryAddWithoutValidation("APP-BUILD", appBuild);
             _http.DefaultRequestHeaders.TryAddWithoutValidation("LOCALE", "en_US");
-            _http.DefaultRequestHeaders.TryAddWithoutValidation("X-Blink-Time-Zone", "America/Los_Angeles");
+            _http.DefaultRequestHeaders.TryAddWithoutValidation("X-Blink-Time-Zone", "UTC");
             if (!string.IsNullOrWhiteSpace(token))
             {
                 _http.DefaultRequestHeaders.TryAddWithoutValidation("TOKEN-AUTH", token);