[github-actions] fix repo name in docker workflow

[jwhui]

No description provided.

[codecov]

Codecov Report

Merging #523 into master will decrease coverage by 6.49%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #523      +/-   ##
==========================================
- Coverage   76.81%   70.31%   -6.50%     
==========================================
  Files          57       57              
  Lines        3851     3850       -1     
==========================================
- Hits         2958     2707     -251     
- Misses        893     1143     +250     

Impacted Files	Coverage Δ
src/web/web-service/wpan_service.hpp	0.00% <0.00%> (-100.00%)	⬇️
src/web/main.cpp	0.00% <0.00%> (-70.91%)	⬇️
src/web/web-service/ot_client.cpp	0.00% <0.00%> (-68.09%)	⬇️
src/web/web-service/web_server.cpp	0.00% <0.00%> (-35.72%)	⬇️
src/web/web-service/wpan_service.cpp	0.00% <0.00%> (-24.80%)	⬇️
src/utils/hex.cpp	48.83% <0.00%> (-20.94%)	⬇️
src/agent/main.cpp	78.82% <0.00%> (-12.95%)	⬇️
src/common/logging.cpp	79.41% <0.00%> (-2.95%)	⬇️
src/agent/ncp_openthread.cpp	74.66% <0.00%> (-2.00%)	⬇️
src/agent/thread_helper.cpp	70.19% <0.00%> (-1.99%)	⬇️
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 250c6d6...a2c2c0a. Read the comment docs.