fix: pass speed parameter through in sync beta count_tokens

Author: felixfbecker

src/anthropic/resources/beta/messages/messages.py

@@ -1846,6 +1846,7 @@ def count_tokens(
                     "mcp_servers": mcp_servers,
                     "output_config": merged_output_config,
                     "output_format": omit,
+                    "speed": speed,
                     "system": system,
                     "thinking": thinking,
                     "tool_choice": tool_choice,