Fix some typos

[mooncak]

Signed-off-by: mooncake [email protected]

What this PR does / why we need it:
Fix some typos in below files:

1. internal/ingress/controller/process/nginx.go
2. internal/ingress/metric/collectors/controller.go
3. internal/ingress/metric/collectors/socket.go
4. internal/ingress/metric/collectors/testutils.go

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

[aledbf]

/lgtm
/approve

[aledbf]

@mooncak thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [aledbf]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[mooncak]

/retest