ci: add cargo check --examples cmd and intentional syntax err

Author: dj8yf0μl

.github/workflows/rust.yml

@@ -82,7 +82,9 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: run cargo doc
-      run: RUSTDOCFLAGS="-D warnings" cargo doc --features derive,unstable__schema
+      run: |
+        RUSTDOCFLAGS="-D warnings" cargo doc --features derive,unstable__schema
+        cargo check --examples
 
   release-plz:
     runs-on: ubuntu-latest

borsh/examples/serde_json_value.rs

@@ -2,7 +2,7 @@ use std::collections::HashMap;
 
 use borsh::{BorshDeserialize, BorshSerialize};
 
-mod serde_json_value {
+od serde_json_value {
     pub use de::deserialize_value;
     pub use ser::serialize_value;
     mod ser {