use fqcns for some task

Signed-off-by: Sebastian Gumprich <github@gumpri.ch>

roles/matrix-bot-mjolnir/tasks/setup_install.yml

@@ -18,7 +18,7 @@
   when: "item.when | bool"
 
 - name: Ensure mjolnir Docker image is pulled
-  docker_image:
+  community.docker.docker_image:
     name: "{{ matrix_bot_mjolnir_docker_image }}"
     source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
     force_source: "{{ matrix_bot_mjolnir_docker_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
@@ -41,7 +41,7 @@
   when: "matrix_bot_mjolnir_container_image_self_build | bool"
 
 - name: Ensure mjolnir Docker image is built
-  docker_image:
+  community.docker.docker_image:
     name: "{{ matrix_bot_mjolnir_docker_image }}"
     source: build
     force_source: "{{ matrix_bot_mjolnir_git_pull_results.changed }}"

roles/matrix-bot-mjolnir/tasks/setup_uninstall.yml

@@ -31,6 +31,6 @@
     state: absent
 
 - name: Ensure mjolnir Docker image doesn't exist
-  docker_image:
+  community.docker.docker_image:
     name: "{{ matrix_bot_mjolnir_docker_image }}"
     state: absent