mod: bump cloud.google.com/go/spanner from 1.82.0 to 1.87.0#6540

dependabot[bot] wants to merge 1 commit intomastergoogle/syzkaller:masterfrom

dependabot/go_modules/cloud.google.com/go/spanner-1.87.0google/syzkaller:dependabot/go_modules/cloud.google.com/go/spanner-1.87.0Copy head branch name to clipboard