[iOS][ProvisionProfiles] Update documentation

To be submitted on Jan 20. Once the new profiles enter in effect.
Mention new profiles and adds information about Credential Provider.

Bug: 1160995
Change-Id: Ie4b57e98fca5543d161f4e46c77200ccae05ee33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2599930Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Javier Flores <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845228}

docs/ios/build_instructions.md

@@ -168,10 +168,13 @@ You then need to request provisioning profiles from Apple for your devices
 for the following bundle identifiers to build and run Chromium with these
 application extensions:
 
--   `${prefix}.chrome.ios.herebedragons`
--   `${prefix}.chrome.ios.herebedragons.ShareExtension`
--   `${prefix}.chrome.ios.herebedragons.TodayExtension`
--   `${prefix}.chrome.ios.herebedragons.SearchTodayExtension`
+-   `${prefix}.chrome.ios.dev`
+-   `${prefix}.chrome.ios.dev.ContentTodayExtension`
+-   `${prefix}.chrome.ios.dev.CredentialProviderExtension`
+-   `${prefix}.chrome.ios.dev.SearchTodayExtension`
+-   `${prefix}.chrome.ios.dev.ShareExtension`
+-   `${prefix}.chrome.ios.dev.TodayExtension`
+-   `${prefix}.chrome.ios.dev.WidgetKitExtension`
 
 All these certificates need to have the "App Groups"
 (`com.apple.security.application-groups`) capability enabled for
@@ -185,6 +188,11 @@ to share files and configurations while the `group.${prefix}.common` is shared
 with Chromium and other applications from the same organisation and can be used
 to send commands to Chromium.
 
+`${prefix}.chrome.ios.dev.CredentialProviderExtension` needs the AutoFill 
+Credential Provider Entitlement, which corresponds to the key 
+`com.apple.developer.authentication-services.autofill-credential-provider`
+Please refer to Apple's documentation on how to set this up.
+
 ### Mobile provisioning profiles for tests
 
 In addition to that, you need a different provisioning profile for each