chore(install): Modify install script to support release candidates

[javirln]

This patch modifies the install script on docs so it allows to downloads CLI versions tagged with release candidates.

[javirln]

bash chainloop/docs/static/install.sh
Step 1: Downloading: chainloop-cli-1.0.0-rc.1-darwin-arm64.tar.gz
Done...

Step 1.2: Verifying checksum
chainloop-cli-1.0.0-rc.1-darwin-arm64.tar.gz: OK
Checksum OK

Step 1.3: Verifying signature
Verified OK
Step 2: Decompressing: /var/folders/ct/h8h0pjcd6q180cnxqhykjv3c0000gn/T/tmp.TzMxU7Glnf/chainloop-cli-1.0.0-rc.1-darwin-arm64.tar.gz
Done...

Step 3: Installing: chainloop in path /usr/local/bin
Step 4: Cleanup
Done...

Client Version: 1.0.0-rc.1
Server Version: 1.0.0-rc.1
Check here for the next steps: https://docs.chainloop.dev

Run 'chainloop auth login' to get started