install go only if version is different from desired

tasks/build/go.yml

@@ -3,6 +3,15 @@
     file: go.yml
     name: _go
 
+- name: check go version
+  ansible.builtin.command:
+    cmd: "go version"
+  register: r_go_version
+  ignore_errors: true
+
+- name: install/update go
+  when: "'{{ _go.version }}' not in r_go_version.stdout"
+  block:
     - name: set go arch
       ansible.builtin.set_fact:
         arch: "{{ _go.archmap[ansible_architecture] }}"