(core) Update assistant link

Summary: Updates the "Learn more" link now that the page is published.

Test Plan: N/A

Reviewers: paulfitz

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D3969

app/client/widgets/FormulaAssistant.ts

@@ -902,7 +902,7 @@ class ChatHistory extends Disposable {
                 'are sent to OpenAI. {{learnMore}}.',
                 {
                   codeView: cssLink(t('Code View'), urlState().setLinkUrl({docPage: 'code'})),
-                  learnMore: cssLink(t('Learn more'), {href: commonUrls.help, target: '_blank'}),
+                  learnMore: cssLink(t('Learn more'), {href: commonUrls.helpAssistantDataUse, target: '_blank'}),
                 }
               ),
             ),

app/common/gristUrls.ts

@@ -66,6 +66,7 @@ export const MIN_URLID_PREFIX_LENGTH = 12;
 export const commonUrls = {
   help: getHelpCenterUrl(),
   helpAccessRules: "https://support.getgrist.com/access-rules",
+  helpAssistantDataUse: "https://support.getgrist.com/ai-assistant/#data-use-policy",
   helpColRefs: "https://support.getgrist.com/col-refs",
   helpConditionalFormatting: "https://support.getgrist.com/conditional-formatting",
   helpFilterButtons: "https://support.getgrist.com/search-sort-filter/#filter-buttons",