Use pkill to shutdown elasticsearch using pid file (#39135)

While running these commands from alias, facing issues using kill `cat pid`, In some situations, the more compact:
```
pkill -F /var/run/myProcess.pid
```
is the way to go.

docs/reference/setup/install/zip-targz-daemon.asciidoc

@@ -14,7 +14,7 @@ To shut down Elasticsearch, kill the process ID recorded in the `pid` file:
 
 [source,sh]
 --------------------------------------------
-kill `cat pid`
+pkill -F pid 
 --------------------------------------------
 
 NOTE: The startup scripts provided in the <<rpm,RPM>> and <<deb,Debian>>