docs: delete unknown URL (aquasecurity#6972)

Signed-off-by: knqyf263 <knqyf263@gmail.com>

docs/getting-started/installation.md

@@ -163,7 +163,7 @@ The plugin used by both tools is developped [here](https://github.com/zufardhiya
 
 ### Download Binary
 
-1. Download the file for your operating system/architecture from [GitHub Release assets](https://github.com/aquasecurity/trivy/releases/tag/{{ git.tag }}) (`curl -LO https://url.to/trivy.tar.gz`).  
+1. Download the file for your operating system/architecture from [GitHub Release assets](https://github.com/aquasecurity/trivy/releases/tag/{{ git.tag }}).  
 2. Unpack the downloaded archive (`tar -xzf ./trivy.tar.gz`).
 3. Put the binary somewhere in your `$PATH` (e.g `mv ./trivy /usr/local/bin/`).
 4. Make sure the binary has execution bit turned on (`chmod +x ./trivy`).