Update cache exceptions following httpx switch

cache.py

@@ -124,11 +124,7 @@ def new(url):
     print(link_line)
     try:
         title, content = extract_page(url)
-    except (
-        requests.adapters.SSLError,
-        lxml.etree.XMLSyntaxError,
-        requests.exceptions.ConnectionError,
-    ) as e:
+    except (lxml.etree.XMLSyntaxError, httpx.exceptions.HTTPError,) as e:
         print(f"WARNING: {e}")
         title, content = "", ""
     cache_path = os.path.join(CACHE_PATH, hash_url)