fix: enable bindgen feature of aws-lc-rs

Since 1.6.1 aws-lc-sys no longer automatically generates its bindings,
instead requiring you to enable the `bindgen` feature if you want to.

This fixes the CI error

```
thread 'main' panicked at
[...]/aws-lc-sys-0.13.0/builder/main.rs:286:5:
E     aws-lc-sys build failed. Please enable the 'bindgen' feature on
aws-lc-rs or aws-lc-sys
```

Signed-off-by: Patrick Roy <roypat@amazon.co.uk>

Author: roypat

Cargo.lock

@@ -9,7 +9,7 @@ license = "Apache-2.0"
 bench = false
 
 [dependencies]
-aws-lc-rs = "1.0.2"
+aws-lc-rs = { version = "1.6.1", features = ["bindgen"] }
 bitflags = "2.0.2"
 derive_more = { version = "0.99.17", default-features = false, features = ["from", "display"] }
 event-manager = "0.4.0"