Fix php-fpm systemd unit detection

php-fpm/tasks/main.yml

@@ -75,7 +75,7 @@
   # yamllint disable rule:line-length
   shell: |
     set -o pipefail
-    systemctl show --state=loaded --type=service --property=Id --value php-fpm@\* | cut -d@ -f2 | cut -d. -f1
+    systemctl show --state=loaded --type=service --property=Id --value php-fpm@\* | grep -v '^$' | cut -d@ -f2 | cut -d. -f1
   args:
     executable: /bin/bash
   # yamllint enable rule:line-length