Update CHANGELOG-VAADIN7.md

CHANGELOG-VAADIN7.md

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 # Vaadin 7 extended maintenance version changelog
 
+## Vaadin 7.7.35
+
+* a check for bundle resources in order not to fail with OSGi
+* update license checker to version 1.9.0
+
+
 ## Vaadin 7.7.34
 
 * Update Jsoup to version 1.15.3