fix: bump linter 1.48.0 and remplace "io/ioutil".

[Monitob]

Error: "io/ioutil" has been deprecated since Go 1.16: As of Go 1.16, the same functionality is now provided by package io or package os, and those implementations should be preferred in new code. See the specific function documentation for details.

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Relates OR Closes #0000

Release note for CHANGELOG:

[codecov-commenter]

Codecov Report

Merging #2447 (12af01f) into master (48fa817) will not change coverage.
The diff coverage is 55.00%.

@@           Coverage Diff           @@
##           master    #2447   +/-   ##
=======================================
  Coverage   76.29%   76.29%           
=======================================
  Files         125      125           
  Lines       21328    21328           
=======================================
  Hits        16273    16273           
  Misses       4504     4504           
  Partials      551      551           

Impacted Files	Coverage Δ
internal/args/marshal.go	80.55% <ø> (ø)
internal/core/arg_file_content.go	12.82% <0.00%> (ø)
internal/core/autocomplete.go	92.73% <ø> (ø)
internal/core/command_interceptor.go	25.96% <0.00%> (ø)
internal/namespaces/autocomplete/autocomplete.go	11.69% <0.00%> (ø)
internal/namespaces/config/commands.go	78.89% <ø> (ø)
internal/namespaces/instance/v1/custom_image.go	78.90% <ø> (ø)
...nal/namespaces/instance/v1/custom_server_create.go	82.29% <ø> (ø)
internal/tabwriter/tabwriter.go	90.66% <ø> (ø)
internal/namespaces/feedback/issue.go	63.15% <33.33%> (ø)
... and 8 more

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