[Snyk] Upgrade flatbuffers from 1.9.0 to 1.12.0#5

snyk-bot wants to merge 1 commit intomasterrs2/arrow:masterfrom

snyk-upgrade-93e355edcef7f33b96b6b5a549e85580rs2/arrow:snyk-upgrade-93e355edcef7f33b96b6b5a549e85580Copy head branch name to clipboard