CI workflow: error uploading artifacts & commiting release notes and version

## Description

The `CI.yml` workflow throws the following error:

`Error: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run`

I was able to track it down to this matrix:

https://github.com/github/gh-gei/blob/b380004c8ab8bd1e2a4bec9c9aafedd42c9f7026/.github/workflows/CI.yml#L18-L20

As the artifacts are uploaded during the `actions` step the conditions on the upload setps must be changed

from:
`if: always() && matrix.runner-os == 'ubuntu-latest'`

to:
`if: always() && matrix.runner-os == 'ubuntu-latest' && matrix.language == 'csharp'`

This fixes the error and the artifacts are uploaded only once.