Changelog for v0.36.0-preview.7 (#24346)

Co-authored-by: gemini-cli-robot <224641728+gemini-cli-robot@users.noreply.github.com>

Author: gemini-cli-robot

docs/changelogs/preview.md

@@ -1,6 +1,6 @@
-# Preview release: v0.36.0-preview.6
+# Preview release: v0.36.0-preview.7
 
-Released: March 28, 2026
+Released: March 31, 2026
 
 Our preview release includes the latest, new, and experimental features. This
 release may not be as stable as our [latest weekly release](latest.md).
@@ -390,4 +390,4 @@ npm install -g @google/gemini-cli@preview
   [#23666](https://github.com/google-gemini/gemini-cli/pull/23666)
 
 **Full Changelog**:
-https://github.com/google-gemini/gemini-cli/compare/v0.35.0-preview.5...v0.36.0-preview.6
+https://github.com/google-gemini/gemini-cli/compare/v0.35.0-preview.5...v0.36.0-preview.7