Fixes issue #206 - typo in install command

[ratracegrad]

🔗 Linked issue 206

❓ Type of change

• [X] 📖 Documentation (updates to the documentation or readme)
• [X] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

There is a typo in the install command where there is a space that was deleted. If user copy/paste existing command it will not work. This PR fixes this issue.

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[RaphaelS1]

Just wanted to add I just got hit by this bug, took me a moment to solve but would be great if this was merged for others who also get stuck!