Revise release process steps in create-a-release.rst

[rtuck99]

Updated the release process steps to include running 'uv sync'.

Fixes #ISSUE

Link to dodal PR (if required): #XXX
(remember to update pyproject.toml with the dodal commit tag if you need it for tests to pass!)

Instructions to reviewer on how to test:

1. Do thing x
2. Confirm thing y happens

Checks for reviewer

• Would the PR title make sense to a user on a set of release notes

[github-actions]

Please add a label to this PR. This helps with generating helpful release notes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.88%. Comparing base (7b58d00) to head (f736ebf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1680   +/-   ##
=======================================
  Coverage   92.88%   92.88%           
=======================================
  Files         155      155           
  Lines        8498     8498           
=======================================
  Hits         7893     7893           
  Misses        605      605           

Components	Coverage Δ
i24 SSX	77.32% <ø> (ø)
hyperion	98.59% <ø> (ø)
other	98.31% <ø> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.