fix: adding close-connection

Signed-off-by: Russ Savage <russ@ngrok.com>

Author: russorat

docs/pricing-limits/traffic-policy-unit-pricing.mdx

@@ -21,6 +21,7 @@ TPUs are sold in bundles of 100,000 for $1 and are charged as your policies exec
 | [add-headers](/traffic-policy/actions/add-headers/)               | Free     |
 | [basic-auth](/traffic-policy/actions/basic-auth/)                 | Free     |
 | [circuit-breaker](/traffic-policy/actions/circuit-breaker/)       | 10 TPUs  |
+| [close-connection](/traffic-policy/actions/close-connection/)     | Free     |
 | [compress-response](/traffic-policy/actions/compress-response/)   | 10 TPUs  |
 | [custom-response](/traffic-policy/actions/custom-response/)       | Free     |
 | [deny](/traffic-policy/actions/deny/)                             | Free     |