go.mod: upgrade nfpm to v2 (#8786)

Upgrade the nfpm package to the latest version to pick up
https://github.com/goreleaser/nfpm/commit/24a43c5ad7cfc549e8a4ec930521a97a30f26cc8.
The upgrade is from v0 to v2, so there was some breakage to fix.
Generated packages should have the same contents as before.

Updates https://github.com/tailscale/tailscale/issues/1882

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>

packages/deb/deb_test.go

@@ -15,8 +15,8 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
-	"github.com/goreleaser/nfpm"
-	_ "github.com/goreleaser/nfpm/deb"
+	"github.com/goreleaser/nfpm/v2"
+	_ "github.com/goreleaser/nfpm/v2/deb"
 )
 
 func TestDebInfo(t *testing.T) {
@@ -38,6 +38,7 @@ func TestDebInfo(t *testing.T) {
 					"Section", "net",
 					"Priority", "extra",
 					"Architecture", "amd64",
+					"Maintainer", "Tail Scalar",
 					"Installed-Size", "0",
 					"Description", "test package"),
 			},
@@ -54,6 +55,7 @@ func TestDebInfo(t *testing.T) {
 					"Section", "net",
 					"Priority", "extra",
 					"Architecture", "arm64",
+					"Maintainer", "Tail Scalar",
 					"Installed-Size", "0",
 					"Description", "test package"),
 			},
@@ -70,6 +72,7 @@ func TestDebInfo(t *testing.T) {
 					"Section", "net",
 					"Priority", "extra",
 					"Architecture", "amd64",
+					"Maintainer", "Tail Scalar",
 					"Installed-Size", "0",
 					"Description", "test package"),
 			},
@@ -167,6 +170,7 @@ func mkTestDeb(version, arch string) []byte {
 		Version:     version,
 		Section:     "net",
 		Priority:    "extra",
+		Maintainer:  "Tail Scalar",
 	})
 
 	pkg, err := nfpm.Get("deb")