Update ncipollo/release-action action to v1.21.0 - #404

0 tests   - 27   0 ✅  - 26   0s ⏱️ - 8m 21s
0 suites  -  1   0 💤  -  1 
0 files    -  1   0 ❌ ± 0 

Results for commit 2600845. ± Comparison against earlier commit cfa629a.