Merge pull request #800 from paullouisageneau/dependabot/cargo/examples/signaling-server-rust/tokio-1.20.4

Bump tokio from 1.20.3 to 1.20.4 in /examples/signaling-server-rust

examples/signaling-server-rust/Cargo.lock

@@ -486,9 +486,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.20.3"
+version = "1.20.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "664cf6576f16c0ad68184998f3c2d4be9903ede6b291a5b5cfc97d29e0057283"
+checksum = "eb78f30e4b41e98ca4cce5acb51168a033839a7af9e42b380355808e14e98ee0"
 dependencies = [
  "autocfg",
  "bytes",