Fixed documentation for FCGI annotation.

[dene14]

What this PR does / why we need it:
Annotation reference is ambiguous in FastCGI documentation. Got myself confused by copying/pasting example from there.

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[k8s-ci-robot]

Hi @dene14. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[dene14]

/assign @ElvinEfendi

[dene14]

I've signed it.

[aledbf]

/ok-to-test

[aledbf]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, dene14

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[aledbf]

@dene14 thanks!

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@0ae5892). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #4849   +/-   ##
=========================================
  Coverage          ?   58.46%           
=========================================
  Files             ?       88           
  Lines             ?     6719           
  Branches          ?        0           
=========================================
  Hits              ?     3928           
  Misses            ?     2362           
  Partials          ?      429

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[k8s-ci-robot]

@dene14: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
pull-ingress-nginx-e2e-1-17	8bf155d	link	/test pull-ingress-nginx-e2e-1-17

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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