Bump nim-eth for revert GasInt back to int64

[jangko]

• The cast[GasInt] have been there before #6345.
• EthTime already a distinct uint64, no need to saturate anymore.

[github-actions[bot]]

Unit Test Results

         9 files  ±0    1 325 suites  ±0   31m 50s :stopwatch: -8s   4 986 tests ±0    4 638 :heavy_check_mark: ±0  348 :zzz: ±0  0 :x: ±0  20 814 runs  ±0  20 410 :heavy_check_mark: ±0  404 :zzz: ±0  0 :x: ±0 

Results for commit 029714af. ± Comparison against base commit 3d65bdcb.

:recycle: This comment has been updated with latest results.