Enable isort linting rules (#267)

See https://docs.astral.sh/ruff/rules/#isort-i.

src/haproxy.py

@@ -1,9 +1,9 @@
 import re
-from bs4 import BeautifulSoup
-from common import http
-from common import endoflife
 from datetime import datetime
 
+from bs4 import BeautifulSoup
+from common import endoflife, http
+
 CYCLE_PATTERN = re.compile(r"^(\d+\.\d+)/$")
 DATE_AND_VERSION_PATTERN = re.compile(r"^(\d{4})/(\d{2})/(\d{2})\s+:\s+(\d+\.\d+\.\d.?)$")  # https://regex101.com/r/1JCnFC/1