Trailing whitespaces in install.sh

[ruzko]

Environmental Info:
K3s Version:

v1.28.5

Node(s) CPU architecture, OS, and Version:

Linux fedora 6.6.14-200.fc39.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Jan 26 20:12:16 UTC 2024 x86_64 GNU/Linux

Cluster Configuration:

Not applicable

Describe the bug:

There are a couple of sections with trailing whitespaces in the install.sh script
It looks bad in text editors that highlight trailing whitespace, and occupies a byte or two of unnecessary space.

Steps To Reproduce:

• Installed K3s:
  Using oneliner from k3s.io

Expected behavior:
No trailing whitespaces in install script

Actual behavior:
Trailing whitespaces in install script

Additional context / logs:
Related PR: #9362

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