p2p: Fix pubsub fuzz test (#10583)

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

beacon-chain/p2p/BUILD.bazel

@@ -118,6 +118,7 @@ go_test(
         "options_test.go",
         "parameter_test.go",
         "pubsub_filter_test.go",
+        "pubsub_fuzz_test.go",
         "pubsub_test.go",
         "rpc_topic_mappings_test.go",
         "sender_test.go",

beacon-chain/p2p/pubsub_fuzz_test.go

@@ -1,5 +1,5 @@
-//go:build fuzz && go1.18 && disabled
-// +build fuzz,go1.18,disabled
+//go:build go1.18
+// +build go1.18
 
 package p2p_test
 
@@ -18,7 +18,7 @@ func FuzzMsgID(f *testing.F) {
 	f.Fuzz(func(t *testing.T, topic string) {
 		_, err := p2p.ExtractGossipDigest(topic)
 		if err != nil {
-			t.Fatal(err)
+			return
 		}
 	})
 }