Create 20240906.md (#1591)[frontend][backend]

release note 1.3.0

Co-authored-by: guzhongren <guzhongren@live.cn>

release-notes/20240906.md

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+# Release Notes
+## September 06 2024 - Released Heartbeat 1.3.0
+- New Features
+  - Support calculate 'lead time for changes' from GitHub only
+  - Provide classification charts with classic view and aggregation view
+  - Explanations are added to each Dora metrics to facilitate users' understanding
+  - Support view project name in report page 
+  - Mark new features on the frontend page
+- Enhancement
+  - Add warning pop-up when user reset the configurations in config page
+  - Add two heartbeat state 'Design' & 'Waiting for deployment' 
+  - Report chart page is displayed first by default
+  - Fix the issue of inconsistent data percentages
+  - Fix the issue of missing 'analysis days' in the export board data 
+