Update golang.org/x/exp/jsonrpc2 digest to 3dfff04

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
golang.org/x/exp/jsonrpc2	require	digest	81e46e3 → 3dfff04

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.81%. Comparing base (cb0999d) to head (6df0041).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3890   +/-   ##
=======================================
  Coverage   67.81%   67.81%           
=======================================
  Files         438      438           
  Lines       44122    44122           
=======================================
  Hits        29921    29921           
  Misses      11856    11856           
  Partials     2345     2345           

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