possible fix for move pv in jaw phase

[Relm-Arrowny]

Fixes #1970

• changed jaw phase move pv.

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 scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.15%. Comparing base (47f3ca6) to head (9e32c62).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2094   +/-   ##
=======================================
  Coverage   99.15%   99.15%           
=======================================
  Files         345      345           
  Lines       13472    13472           
=======================================
  Hits        13358    13358           
  Misses        114      114           

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