Log ending round state @ during resolver debug

This change corrects a tiny-little mistake made in
9f318de that was causing the word
"state" to be printed out in the log instead of the value of the
`ending_round()`'s state` argument.

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

@@ -65,7 +65,7 @@ def starting_round(self, index: int) -> None:
         logger.info("Reporter.starting_round(%r)", index)
 
     def ending_round(self, index: int, state: Any) -> None:
-        logger.info("Reporter.ending_round(%r, state)", index)
+        logger.info("Reporter.ending_round(%r, %r)", index, state)
 
     def ending(self, state: Any) -> None:
         logger.info("Reporter.ending(%r)", state)