update container proxy behaviour with PAC file (#22847)

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## Description

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## Related issues or tickets

Relates to this code changes in
docker/pinata#34220 and
docker/pinata#34955. This PR updates the docs to
reflect the new behaviour.

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- [X] Technical review
- [X] Editorial review
- [ ] Product review

Author: karman-docker

content/manuals/security/for-admins/hardened-desktop/air-gapped-containers.md

@@ -52,7 +52,7 @@ The `containersProxy` setting describes the policy which is applied to traffic f
 > [!IMPORTANT]
 >
 > Any existing `proxy` setting in the `admin-settings.json` file continues to apply to traffic from the app on the host.
-> If the PAC file download fails, the Docker Desktop app and its containers do not block the request; instead, they attempt to connect directly to the target URL.
+> If the PAC file download fails, the containers block the request to the target URL.
 
 ## Example PAC file