Update CHANGELOG.md

Remove dependabot reference

CHANGELOG.md

@@ -287,9 +287,6 @@ All of the merged PRs in August
 - Add libada-go library by ([@katomm](https://github.com/katomm)) in [#230](https://github.com/cardano-foundation/developer-portal/pull/230)
 - House keeping 08 11 2021 by ([@Mercurial](https://github.com/Mercurial)) in [#229](https://github.com/cardano-foundation/developer-portal/pull/229)
 - [DEPLOY] staging to master by ([@Mercurial](https://github.com/Mercurial)) in [#241](https://github.com/cardano-foundation/developer-portal/pull/241)
-- Bump color-string from 1.5.4 to 1.6.0 by ([@dependabot](https://github.com/dependabot)) in [#238](https://github.com/cardano-foundation/developer-portal/pull/238)
-- Bump prismjs from 1.23.0 to 1.24.1 by ([@dependabot](https://github.com/dependabot)) in [#237](https://github.com/cardano-foundation/developer-portal/pull/237)
-- Bump path-parse from 1.0.6 to 1.0.7 by ([@dependabot](https://github.com/dependabot)) in [#242](https://github.com/cardano-foundation/developer-portal/pull/242)
 - Add showcase guideline proposed in #176 by ([@katomm](https://github.com/katomm)) in [#235](https://github.com/cardano-foundation/developer-portal/pull/235)
 - Added The Galgos NFT project by ([@thegalgos](https://github.com/thegalgos)) in [#163](https://github.com/cardano-foundation/developer-portal/pull/163)
 - Add Python Module by ([@emesik](https://github.com/emesik)) in [#220](https://github.com/cardano-foundation/developer-portal/pull/220)
@@ -320,7 +317,6 @@ All of the merged PRs in August
 - nothingalike ([@nothingalike](https://github.com/nothingalike))
 - fdel15 ([@fdel15](https://github.com/fdel15))
 - Mercurial ([@Mercurial](https://github.com/Mercurial))
-- dependabot ([@dependabot](https://github.com/dependabot))
 - thegalgos ([@thegalgos](https://github.com/thegalgos))
 - emesik ([@emesik](https://github.com/emesik))
 - arivictor ([@arivictor](https://github.com/arivictor))
@@ -1397,4 +1393,4 @@ All of the merged PRs in July
 - thenic95 ([@thenic95](https://github.com/thenic95))
 - katomm ([@katomm](https://github.com/katomm))
 - jadjei ([@jadjei](https://github.com/jadjei))
-- dependabot ([@dependabot](https://github.com/dependabot))
+- dependabot ([@dependabot](https://github.com/dependabot))