Update README.md

fix link to changelog.md

Author: mhemani-reach

README.md

@@ -46,7 +46,7 @@ variables are interfering with the action. You can enable this by setting the
 **Bug fixes**
 
 You can find a list of bugs that have been fixed in v3 in the
-[changelog](./changelog.md).
+[changelog](./CHANGELOG.md).
 
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