User-agent update

- use proper program name
- wanted to raise version since HTTP/3 support, but was forgotten

Author: baranyaib90

src/https_client.c

@@ -309,7 +309,7 @@ static void https_fetch_ctx_init(https_client_t *client,
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_TCP_KEEPINTVL, 50L);
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_MAXAGE_CONN, 300L);
 #endif
-  ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_USERAGENT, "dns-to-https-proxy/0.2");
+  ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_USERAGENT, "https_dns_proxy/0.3");
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_FOLLOWLOCATION, 0);
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_NOSIGNAL, 0);
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_TIMEOUT, 10 /* seconds */);