Call out dead reference links in README.md #96

	name: hdmi

	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- uses: actions/setup-python@v2
	with:
	python-version: '3.x'
	- name: Install hdlmake
	run: pip install -r requirements.txt
	- name: Install ModelSim dependencies
	run: \|
	sudo dpkg --add-architecture i386
	sudo apt-get update
	sudo apt-get install lib32z1 lib32stdc++6 libexpat1:i386 libc6:i386 libsm6:i386 libncurses5:i386 libx11-6:i386 zlib1g:i386 libxext6:i386 libxft2:i386 libgcc-s1:i386
	- name: Cache ModelSim
	uses: actions/cache@v2
	with:
	path: ~/intelFPGA/*
	key: ${{ runner.os }}-modelsim-20.1
	- name: Install ModelSim if not cached
	run: stat $HOME/intelFPGA/20.1/modelsim_ase \|\| (curl -L 'https://downloads.intel.com/akdlm/software/acdsinst/20.1std.1/720/ib_installers/ModelSimSetup-20.1.1.720-linux.run' -o ModelSimSetup.run && chmod +x ModelSimSetup.run && ./ModelSimSetup.run --mode unattended --accept_eula 1 )
	- name: Add ModelSim to PATH
	run: echo "$HOME/intelFPGA/20.1/modelsim_ase/bin" >> $GITHUB_PATH
	- name: Top Testbench
	run: cd $GITHUB_WORKSPACE/sim/top_tb/ && hdlmake fetch && hdlmake && make
	- name: Audio Param Testbench
	run: cd $GITHUB_WORKSPACE/sim/audio_param_tb/ && hdlmake fetch && hdlmake && make
	- name: Audio Clock Testbench
	run: cd $GITHUB_WORKSPACE/sim/audio_param_tb/ && hdlmake fetch && hdlmake && make

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