Update column limit to 1999 (#79)

Author: benitav

resources/performance-and-limits.mdx

@@ -24,4 +24,4 @@ The PowerSync Cloud Enterprise plan allows for limits to be customized.
 * Storage size: A soft limit of 100GB for data stored on the PowerSync Service by default.
 * Number of unique users: No hard limit.
 * Number of tables: No hard limit, but having hundreds of tables may slow down startup and sync performance.
-* Number of columns per table: Hard limit of 63 columns per table in the client schema, excluding the id column.
+* Number of columns per table: Hard limit of 1999 columns per table in the client schema, excluding the id column.