Broken Actions version reference

[delaskoff]

When you just say

      - name: Start EC2 runner
        id: start-ec2-runner
        uses: machulav/ec2-github-runner@v2

it doesn't actually use the latest version for some reason

but this commit fcfb31a instead
In comparison, I see that aws-actions/configure-aws-credentials with v4 also leads to the commit in Feb 2024, so maybe there was an issue with Github when it stopped working or something changed so just saying v2 is no longer relevant

[delaskoff]

cc: @Preen, can you help here?
It doesn't even need a PR