ci: fix ubuntu version

[resmo]

No description provided.

[codecov]

Codecov Report

Base: 84.04% // Head: 83.83% // Decreases project coverage by -0.21% ⚠️

Coverage data is based on head (c45b6a4) compared to base (6da2b06).
Patch coverage: 76.41% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
- Coverage   84.04%   83.83%   -0.22%     
==========================================
  Files          56       56              
  Lines        5616     5642      +26     
  Branches     1316     1268      -48     
==========================================
+ Hits         4720     4730      +10     
- Misses        454      469      +15     
- Partials      442      443       +1     

Impacted Files	Coverage Δ
plugins/modules/cs_instance.py	69.09% <43.58%> (-2.11%)	⬇️
plugins/modules/cs_instance_nic.py	89.53% <60.00%> (ø)
plugins/modules/cs_instance_nic_secondaryip.py	87.83% <60.00%> (ø)
plugins/modules/cs_instance_info.py	78.20% <63.63%> (ø)
plugins/modules/cs_account.py	81.81% <66.66%> (ø)
plugins/modules/cs_template.py	59.77% <70.00%> (ø)
plugins/modules/cs_service_offering.py	93.24% <77.77%> (ø)
plugins/modules/cs_loadbalancer_rule_member.py	81.81% <80.00%> (ø)
plugins/modules/cs_portforward.py	91.86% <80.00%> (ø)
plugins/modules/cs_snapshot_policy.py	79.06% <80.00%> (ø)
... and 17 more

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[felixfontein]

I don't think ansible-test uses this file.