Ignore clippy::too_long_first_doc_paragraph lint

```
error: first doc comment paragraph is too long
   --> tools/codegen/src/lib.rs:314:1
    |
314 | / /// GitHub Actions Runner supports Linux (x86_64, aarch64, arm), Windows (x86_64, aarch64),
315 | | /// and macOS (x86_64, aarch64).
316 | | /// https://github.com/actions/runner/blob/v2.315.0/.github/workflows/build.yml#L21
317 | | /// https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners#supported-architectures-and-operating-systems-f...
318 | | ///
319 | | /// Note:
    | |_
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_long_first_doc_paragraph
    = note: `-D clippy::too-long-first-doc-paragraph` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::too_long_first_doc_paragraph)]`
```

tools/codegen/src/lib.rs

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: Apache-2.0 OR MIT
 
+#![allow(clippy::missing_panics_doc, clippy::too_long_first_doc_paragraph)]
+
 use std::{
     cmp::{self, Reverse},
     collections::BTreeMap,
@@ -244,8 +246,6 @@ pub struct BaseManifest {
 }
 impl BaseManifest {
     /// Validate the manifest.
-    // The panic is an assert
-    #[allow(clippy::missing_panics_doc)]
     pub fn validate(&self) {
         for bin in self.bin.iter().chain(self.platform.values().flat_map(|m| &m.bin)) {
             assert!(!bin.as_slice().is_empty());