fix: UI plotting doc typo (#542)

plugins/ui/docs/Plotting.md

@@ -63,7 +63,7 @@ def plot_partitioned_table(table, initial_value):
 p = plot_partitioned_table(_stocks, "DOG")
 ```
 
-## Combining a fitler and a partition by
+## Combining a filter and a partition by
 
 Deephaven Express allows you to plot by a partition and assign unique colors to each key. Sometimes as a user you may also want to filter the data in addition to partitioning it. We've previously referred to this as a "one-click plot by" behaviour in enterprise. This can be done by either filtering the table first and then partitioning it, or partitioning it first and then filtering it. The choice of which to use depends on the size of the table and the number of unique values in the partition key. The first example is more like a traditional "one-click" component, and the second is more like a parameterized query. Both will give you the same result, but the first one may return results faster, whereas the second one may be more memory efficient.