Update README.md

Author: igorpecovnik

README.md

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   <strong>Armbian Linux Kernel Caching</strong><br>
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-<a href=https://github.com/armbian/gitutils/actions/workflows/main-latest.yml><img alt="GitHub Workflow Status" src="https://img.shields.io/github/workflow/status/armbian/gitutils/Make%20shallow%20bundles?logo=linux&label=Make%20shallow%20bundles&style=for-the-badge"></a>
+<a href=https://github.com/armbian/gitutils/actions/workflows/main-latest.yml><img alt="GitHub Workflow Status" src="https://img.shields.io/github/actions/workflow/status/armbian/gitutils/main-latest.yml?logo=linux&label=Make%20shallow%20bundles&style=for-the-badge&branch=main"></a>
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