Mention #krew slack room

[ahmetb]

No description provided.

[codecov-io]

Codecov Report

Merging #495 into master will increase coverage by 0.52%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #495      +/-   ##
========================================
+ Coverage   56.47%    57%   +0.52%     
========================================
  Files          19     21       +2     
  Lines         926    956      +30     
========================================
+ Hits          523    545      +22     
- Misses        350    357       +7     
- Partials       53     54       +1

Impacted Files	Coverage Δ
cmd/krew/cmd/internal/setup_check.go	91.66% <0%> (ø)
cmd/krew/cmd/internal/security_notice.go	0% <0%> (ø)

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[corneliusweig]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahmetb, corneliusweig

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