Swapping readarray for read -rA for macOS

Thesting #@does @it @work?

.github/workflows/wheeltest.yml

@@ -48,7 +48,7 @@ jobs:
           # Get your last commit message, not the merge commit.
           text=$(git log -1 --no-merges --pretty=%B)
           # Read the commit message into an array split by "#".
-          readarray -d "#" -t commit_message <<< "$text"
+          IFS="#" read -rA commit_message <<< "$text"
           # Sanity check.
           echo "the tags are: ${commit_message[1]}"
           # Add tags and overwrite "checking" variable to true if there are tags.