fix: use correct port in example compose.yaml in install.md

Author: jonasnoki

content/influxdb3/core/install.md

@@ -11,4 +11,4 @@ alt_links:
   v1: /influxdb/v1/introduction/install/
 ---
 
-<!--SOURCE content/shared/influxdb3/install.md -->
+<!--SOURCE content/shared/influxdb3/install.md -->