Correct typo in hover/prerender metrics code.

Currently it reports with the wrong predictor enum.

Change-Id: Ib3197bd0b52b1e25d91043a7b426dc3d62731eac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4320889
Auto-Submit: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Simon Pelchat <spelchat@chromium.org>
Reviewed-by: Simon Pelchat <spelchat@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1114844}

content/browser/preloading/preloading_decider.cc

@@ -82,7 +82,7 @@ void PreloadingDecider::OnPointerHover(const GURL& url) {
     // otherwise try to preconnect to it.
     if (MaybePrerender(url)) {
       AddPreloadingPrediction(url,
-                              preloading_predictor::kUrlPointerDownOnAnchor);
+                              preloading_predictor::kUrlPointerHoverOnAnchor);
       return;
     }
     if (ShouldWaitForPrerenderResult(url))