fix(snmpkit): increase timeout on charlist parse test from 1s to 30s

Test takes ~16s on this hardware to resolve/error on invalid
charlists. 1000ms timeout was causing CI pipeline failure, preventing
image build and deployment.

test/snmpkit/snmp_lib/host_parser_test.exs

@@ -155,7 +155,7 @@ defmodule SnmpKit.SnmpLib.HostParserTest do
       assert {:ok, {{0, 0, 0, 0, 0, 0, 0, 1}, 8161}} = HostParser.parse(~c"[::1]:8161")
     end
 
-    @tag timeout: 1000
+    @tag timeout: 30_000
     test "rejects invalid charlists" do
       # These may timeout during hostname resolution, so we allow either error
       case HostParser.parse([300, 400]) do