fix mysql_version

Author: MickLesk

install/kimai-install.sh

@@ -44,7 +44,7 @@ msg_info "Setting up database"
 DB_NAME=kimai_db
 DB_USER=kimai
 DB_PASS=$(openssl rand -base64 18 | tr -dc 'a-zA-Z0-9' | head -c13)
-MYSQL_VERSION=$(mysql --version | grep -oP 'Distrib \K[0-9]+\.[0-9]+\.[0-9]+')
+MYSQL_VERSION=$(mysql --version | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')
 mysql -u root -e "CREATE DATABASE $DB_NAME;"
 mysql -u root -e "CREATE USER '$DB_USER'@'localhost' IDENTIFIED WITH mysql_native_password AS PASSWORD('$DB_PASS');"
 mysql -u root -e "GRANT ALL ON $DB_NAME.* TO '$DB_USER'@'localhost'; FLUSH PRIVILEGES;"