README shows v4

**Description:**
README shows v4 although v5 exists. Consider making it dynamic so that README always picks up the latest release.

**Task version:**
v5

**Platform:**
- [x] Ubuntu
- [ ] macOS
- [ ] Windows

**Runner type:**
- [x] Hosted
- [ ] Self-hosted

**Repro steps:**  
N/A

**Expected behavior:**
README should show latest version.

**Actual behavior:**
README shows older version.