Docs: Replace dead hyperlink for CGI environment variables (pythonGH-132137)

(cherry picked from commit 0a10b45)

Co-authored-by: Srinivas Reddy Thatiparthy (తాటిపర్తి శ్రీనివాస్  రెడ్డి) <[email protected]>

Author: srinivasreddy

Lib/http/server.py

@@ -1104,7 +1104,7 @@ def run_cgi(self):
                     "CGI script is not executable (%r)" % scriptname)
                 return
 
-        # Reference: http://hoohoo.ncsa.uiuc.edu/cgi/env.html
+        # Reference: https://www6.uniovi.es/~antonio/ncsa_httpd/cgi/env.html
         # XXX Much of the following could be prepared ahead of time!
         env = copy.deepcopy(os.environ)
         env['SERVER_SOFTWARE'] = self.version_string()