Added instructions on embedding agent or assistant into a third-party webpage (#4369)

### What problem does this PR solve?


### Type of change

- [x] Documentation Update

web/src/locales/en.ts

@@ -22,7 +22,7 @@ export default {
       languagePlaceholder: 'select your language',
       copy: 'Copy',
       copied: 'Copied',
-      comingSoon: 'Coming Soon',
+      comingSoon: 'Coming soon',
       download: 'Download',
       close: 'Close',
       preview: 'Preview',
@@ -428,7 +428,7 @@ The above is the content you need to summarize.`,
       created: 'Created',
       action: 'Action',
       embedModalTitle: 'Embed into webpage',
-      comingSoon: 'Coming Soon',
+      comingSoon: 'Coming soon',
       fullScreenTitle: 'Full Embed',
       fullScreenDescription:
         'Embed the following iframe into your website at the desired location',