Fix typo in chmod (#352)

Signed-off-by: Julien Pivotto <[email protected]>

Author: roidelapluie

.circleci/config.yml

@@ -68,7 +68,7 @@ jobs:
             curl -sL --fail "${GIT_CHGLOG_URL}" -o 'git-chglog.tar.gz' && \
             sha256sum -c <(echo "${GIT_CHGLOG_SUM} git-chglog.tar.gz") && \
             tar -zvxf git-chglog.tar.gz git-chglog && \
-            chhmod 755 git-chglog
+            chmod 755 git-chglog
       - run: ./git-chglog --output CHANGELOG.md --next-tag "${NEW_TAG}"
       - run: git add CHANGELOG.md
       - run: git commit -m "[ci skip] Automatic changelog update"