fix: ref for autopublish code sha

[ShreyaGangishetty]

Issue #, if available:
#1536

Description of changes:

Description of how you validated changes:

Checklist:

• Write/update tests
• make pr passes
• Update documentation
• Verify transformed template deploys and application functions as expected
• Add/update example to examples/2016-10-31

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-io]

Codecov Report

Merging #1537 into develop will decrease coverage by 0.03%.
The diff coverage is 33.33%.

@@             Coverage Diff             @@
##           develop    #1537      +/-   ##
===========================================
- Coverage    94.10%   94.06%   -0.04%     
===========================================
  Files           78       78              
  Lines         4951     4953       +2     
  Branches       999     1000       +1     
===========================================
  Hits          4659     4659              
- Misses         135      136       +1     
- Partials       157      158       +1     

Impacted Files	Coverage Δ
samtranslator/model/sam_resources.py	93.93% <33.33%> (-0.39%)	⬇️

---

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 1b2d6f2...1b02cad. Read the comment docs.