Docs: Update version references to v0.20.4 in READMEs and docs (#9758)
### What problem does this PR solve?
- Update version tags in README files (including translations) from
v0.20.3 to v0.20.4
- Modify Docker image references and documentation to reflect new
version
- Update version badges and image descriptions
- Maintain consistency across all language variants of README files
### Type of change
- [x] Documentation Update