Update gVisor GOVERNANCE.md

[milantracy]

Reference: https://github.com/cncf/project-template/blob/main/GOVERNANCE-maintainer.md

[EtiennePerot]

I think there needs to be an additional clause here for the case where org votes are even and tied. In this case, I think the least controversial option should be that the side of the vote with the most maintainers in aggregate wins.

[milantracy]

added as

diff --git a/GOVERNANCE.md b/GOVERNANCE.md
index 5037052fa5..49ff2139c2 100644
--- a/GOVERNANCE.md
+++ b/GOVERNANCE.md
@@ -286,6 +286,14 @@ Independent contributors each receive one vote. Where a threshold is stated as a
 simple or two-thirds majority, it is computed over organizational votes rather
 than individual votes for these decision types.
 
+**Resolving an impasse.** Organizational votes can divide evenly when an even
+number of organizations is represented. Where a vote reaches such an impasse,
+the decision is settled by the total number of active maintainers supporting
+each side, counted individually across all organizations, and the side with more
+maintainers prevails. If the maintainer counts are also equal, the motion does
+not carry. So that an impasse can be resolved this way, maintainers record their
+individual positions when voting, even on decisions counted by organization.
+
 **Determining organization.** A maintainer's organization is their current
 employer as recorded in
 [`governance/maintainers.yaml`](governance/maintainers.yaml) and rendered in