[CSUB-373] Fix automated devnet runtime upgrade

[nathanwhit]

Description of proposed changes:
The arguments to the extrinsic for scheduling the upgrade changed slightly. Tested locally and confirmed both
the original issue and that this fix works.

Practical tips for PR review & merge:

• All GitHub Actions report PASS
• Newly added code/functions have unit tests
  • Coverage tools report all newly added lines as covered
  • The positive scenario is exercised
  • Negative scenarios are exercised, e.g. assert on all possible errors
  • Assert on events triggered if applicable
  • Assert on changes made to storage if applicable
• Modified behavior/functions - try to make sure above test items are covered
• Integration tests are added if applicable/needed

[atodorov]

lgtm

[github-actions]

For full LLVM coverage report click here!

[codecov-commenter]

Codecov Report

Merging #877 (49cb3e5) into dev (3cb541a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #877   +/-   ##
=======================================
  Coverage   78.14%   78.14%           
=======================================
  Files          68       68           
  Lines       10666    10666           
=======================================
  Hits         8335     8335           
  Misses       2331     2331           

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