Fix release action not working

[code-yeongyu]

• Make deploy script to raise error explicitly
• Fix typo in Release action
• Add badge about release to README.md

[codecov-commenter]

Codecov Report

Merging #8 (b965a54) into master (817adcd) will not change coverage.
The diff coverage is 0.00%.

❗ Current head b965a54 differs from pull request most recent head 49aa269. Consider uploading reports for the commit 49aa269 to get more accurate results

@@           Coverage Diff           @@
##           master       #8   +/-   ##
=======================================
  Coverage   41.37%   41.37%           
=======================================
  Files          11       11           
  Lines         261      261           
=======================================
  Hits          108      108           
  Misses        153      153           

Impacted Files	Coverage Δ
tasks.py	0.00% <0.00%> (ø)

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