[DOCS] Fixes description of index_total property for GET Transforms stats API docs. (#77354)

docs/reference/rest-api/common-parms.asciidoc

@@ -432,7 +432,7 @@ The amount of time spent indexing, in milliseconds.
 end::index-time-ms[]
 
 tag::index-total[]
-The number of indices created.
+The number of index operations.
 end::index-total[]
 
 tag::bulk-index[]