[Security Center] Update security.txt examples (#17016)

* Update security-file.mdx

Adding examples to contact field

* Update src/content/docs/security-center/infrastructure/security-file.mdx

Co-authored-by: hyperlint-ai[bot] <154288675+hyperlint-ai[bot]@users.noreply.github.com>

* Update src/content/docs/security-center/infrastructure/security-file.mdx

Co-authored-by: hyperlint-ai[bot] <154288675+hyperlint-ai[bot]@users.noreply.github.com>

* Update src/content/docs/security-center/infrastructure/security-file.mdx

---------

Co-authored-by: Kim J <[email protected]>
Co-authored-by: hyperlint-ai[bot] <154288675+hyperlint-ai[bot]@users.noreply.github.com>
Co-authored-by: Kian <[email protected]>

Author: 4 people

src/content/docs/security-center/infrastructure/security-file.mdx

@@ -15,9 +15,9 @@ From here, you can create and manage your `security.txt` file to provide the sec
 Fill in the following information:
 
 - **(Required) Contact**: You can enter one of the following to contact you about security issues:
-  - An email address: The email address must start with `mailto:`.
-  - A phone number: The phone number must start with `tel:`.
-  - A URL link: The URL link must start with `https://`. 
+  - An email address: The email address must start with `mailto:` (for example, `mailto:[email protected]`).
+  - A phone number: The phone number must start with `tel:` (for example, `tel:+1 1234567890`).
+  - A URL link: The URL link must start with `https://` (for example, `https://example.com`).
 
   Select **Add more** to add multiple contacts.
 - **(Required) Expires at**: Enter the expiration date and time of the `security.txt` file.
@@ -34,4 +34,4 @@ To edit your security.txt file, select **Security** > **Settings** > **Edit Secu
 
 To download your security.txt file, select **Security** > **Settings** > **Download Security.txt**.
 
-To delete your security.txt file, select **Security** > **Settings** > **Delete Security.txt**.
+To delete your security.txt file, select **Security** > **Settings** > **Delete Security.txt**.