Align docs workflow tag trigger with testpypi pattern

[Copilot]

The docs workflow was triggering on all tags (*) while testpypi workflow triggers only on version tags (v*.*.*). This causes unnecessary documentation builds for non-version tags.

Changes

• Updated .github/workflows/docs.yml tag pattern from '*' to 'v*.*.*'
• Added inline comment for clarity

Before

on:
  push:
    branches:
      - main
    tags:
      - '*'
  workflow_dispatch:

After

on:
  push:
    branches:
      - main
    tags:
      - 'v*.*.*'  # only trigger on version tags
  workflow_dispatch:

Both workflows now trigger on the same semantic versioning tag pattern, preventing docs builds on arbitrary tags while maintaining sphinx-multiversion functionality for release versions.

Original prompt

Do i need to trigger on tag this a/

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