doc: process.execve is only unavailable for Windows

execve() call is available on Android as well. When process.execve was
first added, it seems like no one checked if that is actually available
on Android as well and works out of the box as __POSIX__ is defined on
Android. process.execve call seems to behave just as fine as on Linux
environment in my testing, so just make the docs specify it.

PR-URL: nodejs#57726
Reviewed-By: Paolo Insogna <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>

Author: thunder-coding

doc/api/process.md

@@ -3374,7 +3374,7 @@ any exit or close events and without running any cleanup handler.
 
 This function will never return, unless an error occurred.
 
-This function is only available on POSIX platforms (i.e. not Windows or Android).
+This function is not available on Windows.
 
 ## `process.report`