Non-KIT: Misc broken URLs (arena2036, catena-x news, sd-factory releases, sldt semantic hub releases)

### Affected source pages

- `./build/blog/community-days-05-2024/index.html:`
- `./build/blog/new-release-3-1-0/index.html:`
- `./build/blog-changelog/page/2/index.html:`
- `./build/blog-changelog/tags/changelog/page/2/index.html:`
- `./build/blog-changelog/tags/release/page/2/index.html:`

### Broken links (full URLs)

From `./build/blog/community-days-05-2024/index.html:`

- `[404] https://arena2036.de/en/projects/arena-x/first-eclipse-tractus-x-community-days-7th-8th-december`
- `[404] https://catena-x.net/en/news-dates/artikel/first-tractus-x-community-days`

From `./build/blog/new-release-3-1-0/index.html:`

- `[404] https://catena-x.net/fileadmin/user_upload/04_Einfuehren_und_umsetzen/Framework_Use_Case_Traceability/Catena-X_Use_Case_Policies_Trace_3.0_EN.pdf`

From changelog pages (releases tags)

- `[404] https://github.com/eclipse-tractusx/sd-factory/releases/tag/2.0.8`
- `[404] https://github.com/eclipse-tractusx/sldt-semantic-hub/releases/tag/semantic-hub-0.2.6-M1`
- `[404] https://github.com/eclipse-tractusx/sldt-semantic-hub/releases/tag/v0.1.19`