Enable isort linting rules (#267)

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

src/couchbase-server.py

@@ -1,10 +1,9 @@
 import re
-from bs4 import BeautifulSoup
-from common import http
-from common import dates
-from common import endoflife
 from datetime import datetime
 
+from bs4 import BeautifulSoup
+from common import dates, endoflife, http
+
 """Fetches versions from release notes of each minor version on docs.couchbase.com.
 
 Dates are not available for all versions, so they must be set manually in some cases.