Install jq instead of dstat

dstat package have beeb renamed to pcp since Debian trixie
https://packages.debian.org/trixie/ia64/dstat

```
$ docker run --rm -it debian:trixie bash

root@710b81c352a7:/# apt-get update

root@710b81c352a7:/# apt-get install -y dstat
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'pcp' instead of 'dstat'

(snip)

done.

root@710b81c352a7:/# dpkg -l dstat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
un  dstat          <none>       <none>       (no description available)
root@710b81c352a7:/# dpkg -l pcp
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-==============================================================
ii  pcp            6.3.8-1      arm64        System level performance monitoring and performance management
```

Therefore, I changed package so that it can be installed on both
new and old versions of Debian for compatibility.

Author: sue445

spec/integration/default_spec.rb

@@ -11,7 +11,7 @@
   it { should be_file }
 end
 
-describe package('dstat') do
+describe package('jq') do
   it { should be_installed }
 end
 

spec/integration/recipes/default.rb

@@ -41,7 +41,7 @@
 
 ######
 
-package 'dstat' do
+package 'jq' do
   action :install
 end