Update CHANGELOG.md

CHANGELOG.md

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 # Changelog
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 **Other changes**:
 
+## [0.7.2][0.x.y] - next release (unpublished yet)
+
+For the full list of this release's changes, see the [release notes][0.x.y].
+
+**New**:
+
+- **Algolia**
+  - [#1651] DocSearch fixed for mobile and for sites with two search boxes (in
+    the top and left navs).
+  - [#1662] DocSearch is natively supported by Docsy now, through site config.
+  - For details, see [Algolia DocSearch].
+
+[#1651]: https://github.com/google/docsy/pull/1651
+[#1662]: https://github.com/google/docsy/pull/1662
+[Algolia DocSearch]:
+  https://www.docsy.dev/docs/adding-content/search/#algolia-docsearch
+
 ## [0.7.1][]
 
 For the full list of this release's changes, see the [release notes][0.7.1].