withdrawal fix to native staking strategy

[naddison36]

Contract Changes

• fixed updating depositedWethAccountedFor on withdrawal from NativeStakingSSVStrategy

Code Change Checklist

To be completed before internal review begins:

• The contract code is complete
• Executable deployment file
• Fork tests that test after the deployment file runs
• Unit tests *if needed
• The owner has done a full checklist review of the code + tests

Internal review:

• Two approvals by internal reviewers

[github-actions]

	Warnings
⚠️	👀 This PR needs at least 2 reviewers

Generated by 🚫 dangerJS against 13c0988

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.88%. Comparing base (56d3331) to head (13c0988).

Additional details and impacted files

@@                     Coverage Diff                      @@
##           sparrowDom/nativeStaking    #2091      +/-   ##
============================================================
- Coverage                     63.03%   62.88%   -0.15%     
============================================================
  Files                            65       65              
  Lines                          3246     3247       +1     
  Branches                        841      841              
============================================================
- Hits                           2046     2042       -4     
- Misses                         1197     1202       +5     
  Partials                          3        3              

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