ci: use go1.23, drop go1.21 (#2933)

.github/workflows/go-test.yml

@@ -17,6 +17,6 @@ jobs:
   go-test:
     uses: ./.github/workflows/go-test-template.yml
     with:
-      go-versions: '["1.21.x", "1.22.x"]'
+      go-versions: '["1.22.x", "1.23.x"]'
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

p2p/net/nat/nat_test.go

@@ -45,7 +45,8 @@ func TestAddMapping(t *testing.T) {
 	require.False(t, found, "didn't expect a port mapping for unmapped protocol")
 	mapped, found := nat.GetMapping("tcp", 10000)
 	require.True(t, found, "expected port mapping")
-	require.Equal(t, netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 2, 3, 4}), 1234), mapped)
+	addr, _ := netip.AddrFromSlice(net.IPv4(1, 2, 3, 4))
+	require.Equal(t, netip.AddrPortFrom(addr, 1234), mapped)
 }
 
 func TestRemoveMapping(t *testing.T) {