v1.138.2

synapse prebuilt bin for synapse_ynh

Please refer to upstream project for the change : https://github.com/element-hq/synapse/releases

Sha256sum for trixie : a5b21f4f5b0b4d91e7787628c1388628a2331d72d75a7b0f186af8b8cc4dd261
Sha256sum for bookworm : 16038f3801292b7bdd56f7097f7eb6f9362dfc1e6582135f5145e1605cc8b373