cmd/vet/jsontags: fix a typo in an error message

Updates #17945

Change-Id: I8987271420feb190f5e4d85caff305c8d4e84aae
Signed-off-by: Alex Chan <alexc@tailscale.com>

cmd/vet/jsontags/report.go

@@ -80,9 +80,9 @@ const (
 func (k ReportKind) message() string {
 	switch k {
 	case OmitEmptyUnsupportedInV1:
-		return "uses `omitempty` on an unspported type in json/v1; should probably use `omitzero` instead"
+		return "uses `omitempty` on an unsupported type in json/v1; should probably use `omitzero` instead"
 	case OmitEmptyUnsupportedInV2:
-		return "uses `omitempty` on an unspported type in json/v2; should probably use `omitzero` instead"
+		return "uses `omitempty` on an unsupported type in json/v2; should probably use `omitzero` instead"
 	case OmitEmptyShouldBeOmitZero:
 		return "should use `omitzero` instead of `omitempty`"
 	case OmitEmptyShouldBeOmitZeroButHasIsZero: