Update CloudPolicyOverridesPlatformPolicy template.

Remove the future flag for the policy.
Update its description for more details.

Bug: 749530
Change-Id: I8a99841f7f199c2d4107b7e9bfd044b0da508a8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1572582Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652151}

components/policy/resources/policy_templates.json

@@ -12488,12 +12488,11 @@
       'id': 381,
       'caption': '''<ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> cloud policy overrides Platform policy.''',
       'tags': [],
-      'future': True,
       'desc': '''
-      If the policy is set to true, cloud  policy takes precedence if it conflicts with platform policy.
+      If the policy is set to true, cloud policy takes precedence if it conflicts with platform policy.
       If the policy is set to false or not configured, platform policy takes precedence if it conflicts with cloud policy.
 
-      This policy is only available as a platform.
+      This policy is only available as a mandatory machine platform policy and it only affects machine scope cloud policies.
       ''',
     },
     {