Update dependency maunium/synapse-http-antispam to v0.4.0

roles/custom/matrix-synapse/defaults/main.yml

@@ -1417,7 +1417,7 @@ matrix_synapse_ext_spam_checker_mjolnir_antispam_config:
 matrix_synapse_ext_synapse_http_antispam_enabled: false
 matrix_synapse_ext_synapse_http_antispam_git_repository_url: "https://github.com/maunium/synapse-http-antispam"
 # renovate: datasource=github-releases depName=maunium/synapse-http-antispam
-matrix_synapse_ext_synapse_http_antispam_git_version: "v0.3.0"
+matrix_synapse_ext_synapse_http_antispam_git_version: "v0.4.0"
 # Where Synapse can locate the consumer of the antispam API. Currently
 # Draupnir is the only consumer of this API that is playbook supported.
 # But https://github.com/maunium/meowlnir also supports the API.