update Namespace match type to Self in antrea network policy doc.

[Jexf]

update Namespace match type to Self in antrea network policy doc.

Fixes: #3091

Signed-off-by: Wu zhengdong zhengdong.wu@transwarp.io

[codecov-commenter]

Codecov Report

Merging #3092 (16bbf8e) into main (0a60d73) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3092      +/-   ##
==========================================
+ Coverage   40.07%   40.08%   +0.01%     
==========================================
  Files         166      166              
  Lines       20818    20818              
==========================================
+ Hits         8342     8345       +3     
+ Misses      11658    11656       -2     
+ Partials      818      817       -1     

Flag	Coverage Δ
unit-tests	40.08% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/agent/cniserver/ipam/antrea_ipam_controller.go	61.53% <0.00%> (-3.85%)	⬇️
pkg/apiserver/storage/ram/store.go	76.86% <0.00%> (-1.50%)	⬇️
pkg/agent/openflow/pipeline.go	21.28% <0.00%> (+0.06%)	⬆️
pkg/apiserver/certificate/certificate.go	76.71% <0.00%> (+6.84%)	⬆️

[antoninbas]

LGTM, thanks for catching this

[antoninbas]

/skip-all

[antoninbas]

@Jexf would you mind cherry-picking this to release-1.1, release-1.2, release-1.3 and release-1.4?
See https://github.com/antrea-io/antrea/blob/main/docs/contributors/cherry-picks.md

[Jexf]

@antoninbas Of course not, I will cherry pick this mr to release branch.