style: add YAML document start markers to Ansible playbooks and tasks

config/ansible/tasks/global/rust.yml

@@ -1,3 +1,4 @@
+---
 - name: Check if Rust is installed
   ansible.builtin.shell: source $HOME/.cargo/env && rustc --version
   register: rust_check
@@ -10,7 +11,7 @@
   ansible.builtin.get_url:
     url: https://sh.rustup.rs
     dest: /tmp/rustup.sh
-    mode: '0755'
+    mode: "0755"
   when: rust_check.rc != 0
 
 - name: Install Rust and Cargo