chore!: update MSRV to 1.74 in workflow and Cargo.toml

Author: roderickvd

.github/workflows/zeroconf_test.yaml

@@ -13,7 +13,7 @@ jobs:
     - name: Install our MSRV
       uses: dtolnay/rust-toolchain@stable
       with:
-         toolchain: "1.70"
+         toolchain: "1.74"
 
     - name: Compile example
       run: cargo build --example register

Cargo.toml

@@ -7,6 +7,7 @@ repository = "https://github.com/librespot-org/libmdns"
 readme = "README.md"
 license = "MIT"
 edition = "2018"
+rust-version = "1.74"
 
 [dependencies]
 byteorder = "1.5"