Bump packer azure plugin version to 2.1.1

[jenkins-infra-updatecli]

Bump packer azure plugin version

Update the azure plugin version in main.pkr.hcl

1 file(s) updated with "azure = {${1}version = \"2.1.1\"": * main.pkr.hcl

2.1.1

Release published on the 2024-04-10 19:45:32 +0000 UTC at the url https://github.com/hashicorp/packer-plugin-azure/releases/tag/v2.1.1

<!-- Release notes generated using configuration in .github/release.yml at v2.1.1 -->

This release contains a fix for a regression released in v2.1.0, when using a `custom_managed_image_name` to use a pre-existing managed image for a source the plugin would incorrectly make a call to our Azure SDK with a context without a deadline, causing the build to immediately fail.

## What's Changed
### Other Changes
* Fix v2.1.0 regression when using `custom_managed_image_name` source  by @JenGoldstrich in https://github.com/hashicorp/packer-plugin-azure/pull/402


**Full Changelog**: https://github.com/hashicorp/packer-plugin-azure/compare/v2.1.0...v2.1.1

Jenkins pipeline link

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[dduportal]

bugfix, LGTM