doc: fix return type of crypto.getFips()

`crypto.getFips()` returns a number, not a boolean.

PR-URL: #32580
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Signed-off-by: Richard Lau <[email protected]>

Author: richardlau

doc/api/crypto.md

@@ -2273,8 +2273,8 @@ console.log(aliceSecret === bobSecret);
 added: v10.0.0
 -->
 
-* Returns: {boolean} `true` if and only if a FIPS compliant crypto provider is
-  currently in use.
+* Returns: {number} `1` if and only if a FIPS compliant crypto provider is
+  currently in use, `0` otherwise.
 
 ### `crypto.getHashes()`
 <!-- YAML