Upgrade synapse-auto-compressor (v0.1.3 -> v0.1.4)

This also removes the condition that made it use `latest` when
self-building is enabled.

v0.1.4 is expected to build correctly now, given that this issue is fixed:
matrix-org/rust-synapse-compress-state#134

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

@@ -6,7 +6,7 @@
 matrix_synapse_auto_compressor_enabled: true
 
 # renovate: datasource=docker depName=registry.gitlab.com/etke.cc/rust-synapse-compress-state
-matrix_synapse_auto_compressor_version: "{{ 'latest' if matrix_synapse_auto_compressor_container_image_self_build else 'v0.1.3' }}"
+matrix_synapse_auto_compressor_version: v0.1.4
 
 matrix_synapse_auto_compressor_base_path: "{{ matrix_base_data_path }}/synapse-auto-compressor"
 matrix_synapse_auto_compressor_container_src_files_path: "{{ matrix_synapse_auto_compressor_base_path }}/container-src"