misc: update README file;

scripts/destVersionForMac.py

@@ -92,22 +92,11 @@ def fetch_head_metadata(url: str) -> dict[str, str]:
     Returns:
         dict[str, str]: 从 HEAD 响应中提取的元数据字典，键为小写字符串，值为对应的响应头值
     """
+
     # Use HEAD request to read metadata from the direct file link.
-    attempts = 2
-    last_error: Exception | None = None
-    for attempt in range(1, attempts + 1):
-        try:
-            request = urllib.request.Request(url, method="HEAD")
-            with urllib.request.urlopen(request, timeout=30) as response:
-                return {key.lower(): value.strip() for key, value in response.headers.items()}
-        except Exception as exc:
-            last_error = exc
-            if attempt < attempts:
-                log(f"HEAD request failed (attempt {attempt}). Waiting before retry...")
-                time.sleep(10)
-    if last_error:
-        log(f"HEAD request failed after {attempts} attempts: {last_error}")
-        return {}
+    request = urllib.request.Request(url, method="HEAD")
+    with urllib.request.urlopen(request, timeout=30) as response:
+        return {key.lower(): value.strip() for key, value in response.headers.items()}
 
 def download_with_retry(url: str, dest: Path) -> None:
     """