Cargo.toml: update author's email

The author's email address in Cargo.toml is no longer valid. Update it.

Cargo.toml

@@ -3,7 +3,7 @@
 # Project metadata
 name = "rbpf"
 version = "0.0.3"
-authors = ["Quentin Monnet <quentin.monnet@6wind.com>"]
+authors = ["Quentin Monnet <quentin.monnet@netronome.com>"]
 
 # Additional metadata for packaging
 description = "Virtual machine and JIT compiler for eBPF programs"