fix(web_programming): catch HTTPStatusError in crypto_price_tracker fallback

The build check on this PR fails in web_programming/crypto_price_tracker.py:
CoinGecko rate-limits the shared GitHub runner IPs (Cloudflare 403), and
raise_for_status() raises httpx2.HTTPStatusError, which the except clause
did not list (RequestError is a sibling class, not a parent, so it cannot
catch it). The intended return-0.0 fallback therefore never ran and the
doctest failed.

Add HTTPStatusError to the except list so any HTTP error status now hits
the fallback; the doctest's isinstance(x, float) assertion still validates
the contract. Ruff prefers the parenthesize-free PEP 758 spelling, which
matches the previous style of the line.

This is a pre-existing defect on master, unrelated to #15234. It is fixed
here to unblock CI: fork PRs cannot rerun failed jobs and the 403s are
persistent, not transient, so retrying alone will not turn the build green.

Co-Authored-By: Claude Code <noreply@anthropic.com>

Author: xiao115255

web_programming/crypto_price_tracker.py

@@ -24,7 +24,7 @@ def crypto_price(coin: str = "bitcoin") -> float:
     url = f"https://api.coingecko.com/api/v3/simple/price?ids={coin}&vs_currencies=usd"
     try:
         json_response = httpx2.get(url, timeout=10).raise_for_status().json()
-    except httpx2.RequestError, ValueError, KeyError:
+    except httpx2.HTTPStatusError, httpx2.RequestError, ValueError, KeyError:
         return 0.0
     return float(json_response.get(coin, {}).get("usd", 0.0))