Update planned removal milestone for BuiltinCertificateVerifierEnabled policy on macOS.

Stable rollout is starting in M87 now, update ending milestone to match.

Change-Id: I6654f5ccc836430900a59ae4c58637175df1255e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2499175Reviewed-by: Pavol Marko <pmarko@chromium.org>
Commit-Queue: Matt Mueller <mattm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821558}

components/policy/resources/policy_templates.json

@@ -8602,7 +8602,7 @@
 
       This policy is planned to be removed in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> for Linux version 83, when support for the legacy certificate verifier on Linux is planned to be removed.
 
-      This policy is planned to be removed in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> for Mac OS X version 87, when support for the legacy certificate verifier on Mac OS X is planned to be removed.
+      This policy is planned to be removed in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> for Mac OS X version 91, when support for the legacy certificate verifier on Mac OS X is planned to be removed.
       ''',
     },
     {