build: upgrade to execution-spec-tests v5.1.0 (#32742)

https://github.com/ethereum/execution-spec-tests/releases/tag/v5.1.0

Author: fjl

build/checksums.txt

@@ -1,9 +1,9 @@
 # This file contains sha256 checksums of optional build dependencies.
 
-# version:spec-tests v5.0.0
+# version:spec-tests v5.1.0
 # https://github.com/ethereum/execution-spec-tests/releases
-# https://github.com/ethereum/execution-spec-tests/releases/download/v5.0.0
-a5ed96800ca1af0d86fe2ee894861c24eea079bfb83b924f565bb86ba70021d5  fixtures_develop.tar.gz
+# https://github.com/ethereum/execution-spec-tests/releases/download/v5.1.0
+a3192784375acec7eaec492799d5c5d0c47a2909a3cc40178898e4ecd20cc416  fixtures_develop.tar.gz
 
 # version:golang 1.25.1
 # https://go.dev/dl/