chore: add Codacy Security Scan badge

Author: boiled-darvari

README.md

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 High-performance distributed video transcoding with CPU/GPU support
 
+[![Codacy Security Scan](https://github.com/boiled-darvari/hpc-transcode/actions/workflows/codacy.yml/badge.svg)](https://github.com/boiled-darvari/hpc-transcode/actions/workflows/codacy.yml)
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 ## Features
 
 - Distributed transcoding across multiple nodes using SSH