internal/postgres: fix misspelling of preceded
internal/postgres: fix misspelling of preceded

Change-Id: I16fbe356ee414302babb1e45d8bc683f0fc861c2
Reviewed-on: https://team-review.git.corp.google.com/c/golang/discovery/+/717236
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

golang/pkgsite,golang/pkgsite,golang/pkgsite,golang/pkgsite