bumping sei-tendermint to 0.6.7

[pompon0]

bumping sei-tendermint to include sei-protocol/sei-tendermint#332

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.29%. Comparing base (b5edf56) to head (ab26a79).
⚠️ Report is 1 commits behind head on release/v6.2.0-branch.

Additional details and impacted files

@@                  Coverage Diff                   @@
##           release/v6.2.0-branch    #2472   +/-   ##
======================================================
  Coverage                  63.28%   63.29%           
======================================================
  Files                        361      361           
  Lines                      32939    32939           
======================================================
+ Hits                       20846    20849    +3     
+ Misses                     10645    10643    -2     
+ Partials                    1448     1447    -1     

see 2 files with indirect coverage changes

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