Update CHANGELOG.md

CHANGELOG.md

-Version 1.8 (not yet released)
+Version 1.9 (not yet released)
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+* Support deleting conditions from actions.
 
 Version 1.8
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 * Fixed issue when output handler is not set breaking the whole form processor.
 * Implemented Grouped Parameter Specification (requires Action Provider version 1.20 or newer).
-* Support deleting conditions from actions.
 
 Version 1.7
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