docs: fix tipo of helm repo address

[H0lySh1t]

Docs: remove trailing slash of helm repo address

Remove trailing slash of helm repo address in the documentation, so the command won't fail.

How to use

Execute the helm repo add command

Testing done

Tested on Ubuntu 22.04.2 LTS with helm3 v3.10.1

Original:

~$ helm repo add nebraska https://kinvolk.github.io/nebraska/
Error: looks like "https://kinvolk.github.io/nebraska/" is not a valid chart repository or cannot be reached: failed to fetch https://kinvolk.github.io/nebraska/index.yaml : 404 Not Found

Fixed:

~$ helm repo add nebraska https://flatcar.github.io/nebraska
"nebraska" has been added to your repositories

• Changelog entries added in the respective changelog/ directory (user-facing change, bug fix, security fix, update)
• Inspected CI output for image differences: /boot and /usr size, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.

[tormath1]

Hello @H0lySh1t thanks for your contribution. I think the main issue, as shown in your bash snippets, is the renaming from kinvolk to flatcar (and not the trailing slash):

- $ helm repo add nebraska https://kinvolk.github.io/nebraska
+ $ helm repo add nebraska https://flatcar.github.io/nebraska

[H0lySh1t]

🤦‍♂️ sorry

[tormath1]

@H0lySh1t 👋 do you want to push a fix to merge this contribution? :)