correct docs to reflect this change

docs/reference/esql/functions/pow.asciidoc

@@ -5,7 +5,7 @@
 image::esql/functions/signature/pow.svg[Embedded,opts=inline]
 
 Returns the value of a base (first argument) raised to the power of an exponent (second argument).
-Both arguments must be numeric.
+Both arguments must be numeric. The output is always a double.
 
 [source.merge.styled,esql]
 ----
@@ -16,31 +16,6 @@ include::{esql-specs}/math.csv-spec[tag=powDI]
 include::{esql-specs}/math.csv-spec[tag=powDI-result]
 |===
 
-[discrete]
-==== Type rules
-
-The type of the returned value is determined by the types of the base and exponent.
-The following rules are applied to determine the result type:
-
-* If either of the base or exponent are of a floating point type, the result will be a double
-* Otherwise, if either the base or the exponent are 64-bit (long or unsigned long), the result will be a long
-* Otherwise, the result will be a 32-bit integer (this covers all other numeric types, including int, short and byte)
-
-For example, using simple integers as arguments will lead to an integer result:
-
-[source.merge.styled,esql]
-----
-include::{esql-specs}/math.csv-spec[tag=powII]
-----
-[%header.monospaced.styled,format=dsv,separator=|]
-|===
-include::{esql-specs}/math.csv-spec[tag=powII-result]
-|===
-
-NOTE: The actual power function is performed using double precision values for all cases.
-This means that for very large non-floating point values there is a small chance that the
-operation can lead to slightly different answers than expected.
-However, a more likely outcome of very large non-floating point values is numerical overflow.
 
 [discrete]
 ==== Arithmetic errors
@@ -62,16 +37,6 @@ include::{esql-specs}/math.csv-spec[tag=powULOverrun-warning]
 include::{esql-specs}/math.csv-spec[tag=powULOverrun-result]
 |===
 
-If it is desired to protect against numerical overruns, use `TO_DOUBLE` on either of the arguments:
-
-[source.merge.styled,esql]
-----
-include::{esql-specs}/math.csv-spec[tag=pow2d]
-----
-[%header.monospaced.styled,format=dsv,separator=|]
-|===
-include::{esql-specs}/math.csv-spec[tag=pow2d-result]
-|===
 
 [discrete]
 ==== Fractional exponents

docs/reference/esql/functions/types/pow.asciidoc

@@ -4,7 +4,7 @@ base | exponent | result
 double | double | double
 double | integer | double
 integer | double | double
-integer | integer | integer
+integer | integer | double
 long | double | double
-long | integer | long
+long | integer | double
 |===