Merge pull request #10516 from ziebam/iss9255-include-backtracking-do…

…cs-in-backtracking-output

src/pip/_internal/resolution/resolvelib/reporter.py

@@ -27,8 +27,8 @@ def __init__(self) -> None:
             13: (
                 "This is taking longer than usual. You might need to provide "
                 "the dependency resolver with stricter constraints to reduce "
-                "runtime. If you want to abort this run, you can press "
-                "Ctrl + C to do so."
+                "runtime. See https://pip.pypa.io/warnings/backtracking for "
+                "guidance. If you want to abort this run, press Ctrl + C."
             ),
         }