[FIX] Docker build failure doesn't display logs because build_log is now a list of dicts?

odoo_openupgrade_wizard/tools/tools_docker.py

@@ -31,7 +31,7 @@ def build_image(path, tag, buildargs={}):
         )
         logger.debug("Image build done.")
     except docker.errors.BuildError as buildError:
-        logger.error("\n".join(buildError.build_log))
+        logger.error("\n".join([str(log) for log in buildError.build_log]))
         logger.error("Image build failed.")
 
     return image