FIX Use brackets for if statement (#88)

.github/workflows/ci.yml

@@ -851,7 +851,9 @@ jobs:
                 BRANCH_MAJOR=${BASH_REMATCH[0]}
                 echo "Checking for supported modules in CMS $CMS_MAJOR against branch major $BRANCH_MAJOR"
                 curl -s -o __modules.json https://raw.githubusercontent.com/silverstripe/supported-modules/$CMS_MAJOR/modules.json
-                if ! jq -e '.' __modules.json >/dev/null 2>&1; then
+                # If we can't parse the JSON at all, $MODULES will be an empty string and that means we couldn't fetch the file.
+                MODULES=$(jq -e '.' __modules.json) || true
+                if [[ $MODULES == "" ]]; then
                   # If there is some error getting the file (e.g. 404 if $CMS_MAJOR is some value we don't have a file for),
                   # the error will be in the __modules.json file - importantly, not in JSON format.
                   echo "Cannot parse supported-modules JSON. Aborting. The content we tried to parse was:"