docs: minor typos in code examples

[andyfeller]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Optional. My organization is added to USERS.md.
• I've signed the CLA and my build is green (troubleshooting builds).

[codecov]

Codecov Report

Merging #3622 into master will decrease coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3622      +/-   ##
==========================================
- Coverage   41.22%   41.09%   -0.14%     
==========================================
  Files         115      115              
  Lines       16470    16475       +5     
==========================================
- Hits         6790     6770      -20     
- Misses       8799     8824      +25     
  Partials      881      881              

Impacted Files	Coverage Δ
server/server.go	53.82% <0.00%> (-1.65%)	⬇️
pkg/apis/application/v1alpha1/hack.go	0.00% <0.00%> (ø)
server/application/application.go	28.31% <0.00%> (+0.34%)	⬆️

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[andyfeller]

Fixes typos introduced in #3292

[jannfis]

Nice catch, @andyfeller! Thanks a lot!