Fix bash syntax

Author: BanzaiMan

bin/compile

@@ -28,7 +28,7 @@ sudo wget -O /usr/local/ssl/cert.pem https://curl.haxx.se/ca/cacert.pem
 
 # don't install pear on master (issue with php 8.0)
 # this could be a temp issue though
-if [[ ! $VERSION =~ ^master$ || $VERSION =~ snapshot$]]; then
+if [[ ! $VERSION =~ ^master$ || $VERSION =~ snapshot$ ]]; then
   curl -fsSL --retry 20 -O http://pear.php.net/go-pear.phar
 
   env TZ=UTC $TRAVIS_BUILD_DIR/bin/install-pear