chore: fix the branch checking condition

Author: gajus

.scripts/release.sh

@@ -7,7 +7,7 @@ if [[ $TRAVIS_PULL_REQUEST = "true" ]]; then
   exit 0
 fi
 
-if [[ $TRAVIS_BRANCH = "master" ]]; then
+if [[ $TRAVIS_BRANCH != "master" ]]; then
   echo 'This is not a master branch. Exiting the release script.'
 
   exit 0