Reduce minimum version to 1.75 to target Noble

Signed-off-by: Michael X. Grey <[email protected]>

Author: mxgrey

.github/workflows/rust-minimal.yml

@@ -54,7 +54,7 @@ jobs:
         use-ros2-testing: ${{ matrix.ros_distribution == 'rolling' }}
 
     - name: Setup Rust
-      uses: dtolnay/rust-toolchain@1.78
+      uses: dtolnay/rust-toolchain@1.75
       with:
         components: clippy, rustfmt
 

rclrs/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Esteve Fernandez <[email protected]>", "Nikolai Morin <nnmmgit@gmail
 edition = "2021"
 license = "Apache-2.0"
 description = "A ROS 2 client library for developing robotics applications in Rust"
-rust-version = "1.78"
+rust-version = "1.75"
 
 [lib]
 path = "src/lib.rs"