[Docs] Fix documentation for percentiles bucket aggregation (#25229)

docs/reference/aggregations/pipeline/percentiles-bucket-aggregation.asciidoc

@@ -20,10 +20,10 @@ A `percentiles_bucket` aggregation looks like this in isolation:
 --------------------------------------------------
 // NOTCONSOLE
 
-.`sum_bucket` Parameters
+.`percentiles_bucket` Parameters
 |===
 |Parameter Name |Description |Required |Default Value
-|`buckets_path` |The path to the buckets we wish to find the sum for (see <<buckets-path-syntax>> for more
+|`buckets_path` |The path to the buckets we wish to find the percentiles for (see <<buckets-path-syntax>> for more
  details) |Required |
 |`gap_policy` |The policy to apply when gaps are found in the data (see <<gap-policy>> for more
  details)|Optional | `skip`