Point p4rs at zl/multicast for bitmap-based replication

Author: zeeshanlakhani

Cargo.lock

@@ -31,7 +31,7 @@ ztest = { git = "https://github.com/oxidecomputer/falcon" }
 curl = "0.4.49"
 octocrab = "0.49"
 libnet = { git = "https://github.com/oxidecomputer/netadm-sys", branch = "main" }
-p4rs = { git = "https://github.com/oxidecomputer/p4", branch = "main" }
+p4rs = { git = "https://github.com/oxidecomputer/p4", branch = "zl/multicast" }
 sha256 = "1.6.0"
 camino = "1.2.2"
 thiserror = "2.0.18"