chore: fix test coverage reporting (#956)

### Description

fix coverage reporting

failing runs: 
- timeout
https://github.com/CycloneDX/cyclonedx-python-lib/actions/runs/24053559593/job/70220791872#step:3:350
- unresolvable target:
https://github.com/CycloneDX/cyclonedx-python-lib/actions/runs/24052662937/job/70152194867#step:3:422

### AI Tool Disclosure

- [x] My contribution does not include any AI-generated content
- [ ] My contribution includes AI-generated content, as disclosed below:
  - AI Tools: `[e.g. GitHub CoPilot, ChatGPT, JetBrains Junie etc.]`
- LLMs and versions: `[e.g. GPT-4.1, Claude Haiku 4.5, Gemini 2.5 Pro
etc.]`
- Prompts: `[Summarize the key prompts or instructions given to the AI
tools]`

### Affirmation

- [x] My code follows the
[CONTRIBUTING.md](https://github.com/CycloneDX/cyclonedx-python-lib/blob/main/CONTRIBUTING.md)
guidelines

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

.github/workflows/python.yml

@@ -236,7 +236,7 @@ jobs:
     name: Publish test coverage
     needs: [ "build-and-test" ]
     runs-on: ubuntu-latest
-    timeout-minutes: 5
+    timeout-minutes: 10
     steps:
       - name: fetch test artifacts
         # see https://github.com/actions/download-artifact