A0-3761: Tweak FE update workflow to use a separate featurenet-update…

… workflow (#1586)

# Description

Tiny tweak to featurenet workflows. "Update" workflow will use a
separate 'featurenet-update' workflow from github-actions repository.
Having 'featurenet-create' there, with inputs such as validator numbers
etc. that we actually not used is a bit confusing.

## Type of change

- CI tweak, which is not breaking anything

# Checklist:

- I have ran tests for the changes

.github/workflows/featurenet-update.yml

@@ -103,7 +103,7 @@ jobs:
     # to prevent this job to be skipped when on of the parent jobs is skipped
     if: ${{ !cancelled() }}
     name: Update featurenet
-    uses: Cardinal-Cryptography/github-actions/.github/workflows/_featurenet-create.yml@v6
+    uses: Cardinal-Cryptography/github-actions/.github/workflows/_featurenet-update.yml@v6
     secrets: inherit
     with:
       featurenet-name: ${{ inputs.featurenet-name }}