Update to Rocky Linux 8 on Node.js examples.

Author: geerlingguy

.github/workflows/ci.yml

@@ -107,10 +107,10 @@ jobs:
           #   distro: ubuntu2004
 
           - playbook: nodejs.yml
-            distro: centos7
+            distro: rockylinux8
 
           - playbook: nodejs-role.yml
-            distro: centos7
+            distro: rockylinux8
 
           - playbook: security.yml
             distro: rockylinux8
@@ -119,7 +119,7 @@ jobs:
             distro: ubuntu2004
 
           - playbook: test-plugin.yml
-            distro: centos7
+            distro: rockylinux8
 
     steps:
       - uses: actions/checkout@v2