Docs: add Nginx example to X-Content-Type-Options

[lotarbo]

Pull request checklist

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• Signed the Contributor License Agreement
• Followed the commit message guidelines

For non-trivial changes, please make sure you also:

• Added/Updated related documentation.
• Added/Updated related tests.

Short description of the change(s)

Hello,

1. I cant sign CLA, coz of error
   
2. I use hint for testing my projects and fix. I cant add nginx examples based on my work, because i use nginx. But i'm not an expert)
3. How i can add examples. one by one, or can add several examples on one pull request?)

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Bogdan Lotarev (53b4183)

[molant]

How i can add examples. one by one, or can add several examples on one pull request?)

Whatever works best for you, no preferences from my side 😊

[antross]

I cant sign CLA, coz of error

Sorry about the PR template still pointing to the old CLA. I see you were able to get the new CLA signed, but it's a good reminder for me to get that fixed 😀