fix(deploy): indent for imagePullSecrets

[chris199512]

Why is this PR required? What issue does it fix?:
When we were pulling the image from a private repo, we noticed that the synax is wrong for zfs-node and zfs-controller. The indent must be 8 and not 2.
What this PR does?:
change indent
Does this PR require any upgrade changes?:
No
If the changes in this PR are manually verified, list down the scenarios covered::
N/A
Any additional information for your reviewer? :
N/A
Checklist:

Fixes
PR Title follows the convention of ():
Has the change log section been updated?
Commit has unit tests
Commit has integration tests
(Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
(Optional) If documentation changes are required, which issue on https://github.com/openebs/website is used to track

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.99%. Comparing base (e3d55d7) to head (8c402d3).
Report is 12 commits behind head on develop.

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #596      +/-   ##
===========================================
- Coverage    96.37%   95.99%   -0.38%     
===========================================
  Files            1        1              
  Lines          496      574      +78     
===========================================
+ Hits           478      551      +73     
- Misses          14       19       +5     
  Partials         4        4              

Flag	Coverage Δ
bddtests	95.99% <100.00%> (-0.38%)	⬇️

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[tiagolobocastro]

Thanks! Could you please a signature to your commit?
https://github.com/openebs/zfs-localpv/blob/develop/CONTRIBUTING.md#sign-your-work

[sinhaashish]

@chris199512 can you please sign your commit as @tiagolobocastro suggested, then we can merge it