Fix beeper-linkedin self-building when version is set to latest

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2905#issuecomment-1726892215

roles/custom/matrix-bridge-beeper-linkedin/defaults/main.yml

@@ -14,7 +14,7 @@ matrix_beeper_linkedin_docker_image_tag: "{{ 'latest' if matrix_beeper_linkedin_
 
 matrix_beeper_linkedin_container_image_self_build: false
 matrix_beeper_linkedin_container_image_self_build_repo: "https://github.com/beeper/linkedin"
-matrix_beeper_linkedin_container_image_self_build_branch: "{{ matrix_beeper_linkedin_version }}"
+matrix_beeper_linkedin_container_image_self_build_branch: "{{ 'master' if matrix_beeper_linkedin_version == 'latest' else matrix_beeper_linkedin_version }}"
 
 matrix_beeper_linkedin_base_path: "{{ matrix_base_data_path }}/beeper-linkedin"
 matrix_beeper_linkedin_config_path: "{{ matrix_beeper_linkedin_base_path }}/config"