deps: V8: bump v8_embedder_string for 0e21c1e637bf#31096

ChALkeR wants to merge 1 commit intonodejs:masternodejs/node:masterfrom

ChALkeR:chalker/v8-cherrypick-scavenges-update-stringChALkeR/io.js:chalker/v8-cherrypick-scavenges-update-stringCopy head branch name to clipboard