[readme] Fix Ansible Linting Errors

Fixes #2860.

This fixes these two linting errors:
- fqcn-builtins: Use FQCN for builtin actions.
- name: All names should start with an uppercase letter. (name[casing])

README.md

@@ -161,8 +161,8 @@ If the above doesn't fix the problem, you may try the following:
 You can use a task:
 
 ```yaml
-- name: nvm
+- name: Install nvm
-  shell: >
+  ansible.builtin.shell: >
     curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
   args:
     creates: "{{ ansible_env.HOME }}/.nvm/nvm.sh"