README: Add missing namespace to developer workflow

[jschintag]

What this PR does / why we need it:

When deploying HCO via operator-sdk, the run command should contain the correct
namespace, as it otherwise fails.
Additionally, my IDE removed the trailing white spaces, so i committed that as a separate commit.

Reviewer Checklist

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• PR Message
• Commit Messages
• How to test
• Unit Tests
• Functional Tests
• User Documentation
• Developer Documentation
• Upgrade Scenario
• Uninstallation Scenario
• Backward Compatibility
• Troubleshooting Friendly

Jira Ticket:

NONE

Release note:

NONE

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[coveralls]

Pull Request Test Coverage Report for Build 11436501081

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 72.445%

---

Files with Coverage Reduction	New Missed Lines	%
controllers/operands/quickStart.go	1	82.14%

Totals
Change from base Build 11386986558:	-0.01%
Covered Lines:	6039
Relevant Lines:	8336

---

💛 - Coveralls

[tiraboschi]

/approve

[kubevirt-bot]

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