Update CHANGELOG.md

Author: azr

CHANGELOG.md

@@ -1,6 +1,6 @@
 ## 0.2.8 (Upcoming)
 
-* sdk: packer-sdc add plugin-check command to check plugin validity, `packer-sdc plugin-check -h` [#85](https://github.com/hashicorp/packer-plugin-sdk/pull/85)
+* sdk: packer-sdc add plugin-check command to check plugin validity, try `packer-sdc plugin-check -h` for help [#85](https://github.com/hashicorp/packer-plugin-sdk/pull/85)
 
 ## 0.2.7 (October 07, 2021)