chore: Fix typo in list_memory_configurations (#61)

Author: alek-p

README.md

@@ -85,7 +85,7 @@ Interact with Postgres using natural language right from your IDE:
  * `list_installed_extensions`: Use this tool to list installed extensions.
  * `get_query_plan`: Use this tool to get query plan.
  * `list_autovacuum_configurations`: Use this tool to list autovacuum configurations and its value.
- * `list_memory_configuration`s: Use this tool to list memory configurations and its value.
+ * `list_memory_configurations`: Use this tool to list memory configurations and its value.
  * `list_top_bloated_tables`: Use this tool to list top bloated tables.
  * `list_replication_slots`: Use this tool to list replication slots.
  * `list_invalid_indexes`: Use this tool to list invalid indexes.