codegen: Ignore martin 1.16.1

```
     Running `target/release/generate-manifest martin latest`
download cache: /home/runner/work/install-action/install-action/tools/codegen/tmp/cache/martin
downloading metadata from https://api.github.com/repos/maplibre/martin
downloading releases from https://api.github.com/repos/maplibre/martin/releases
downloading crate info from https://crates.io/api/v1/crates/martin
loading pre-existing manifest /home/runner/work/install-action/install-action/manifests/martin.json
update manifest for versions '>=1.15.0'
downloading https://github.com/maplibre/martin/releases/download/martin-v1.16.1/martin-x86_64-unknown-linux-musl.tar.gz for etag and checksum ... download complete
getting sha256 hash for https://github.com/maplibre/martin/releases/download/martin-v1.16.1/martin-x86_64-unknown-linux-musl.tar.gz
831df5399bb573a8b6bc01dbb38be5938c0e95501e715403d9eacd9143b33348 *martin-x86_64-unknown-linux-musl.tar.gz
verifying https://github.com/maplibre/martin/releases/download/martin-v1.16.1/martin-x86_64-unknown-linux-musl.tar.gz with gh attestation verify

Error: verifying with issuer "sigstore.dev"

thread 'main' (4328) panicked at tools/codegen/src/main.rs:580:26:
called `Result::unwrap()` on an `Err` value: process didn't exit successfully: `gh attestation verify --repo maplibre/martin --signer-workflow maplibre/martin/.github/workflows/ci.yml /home/runner/work/install-action/install-action/tools/codegen/tmp/cache/martin/1.16.1-x86_64_linux_musl-martin-x86_64-unknown-linux-musl.tar.gz` (exit status: 1)

Stack backtrace:
   0: <anyhow::Error>::msg::<alloc::string::String>
   1: generate_manifest::process::process_error
   2: <generate_manifest::process::ProcessBuilder>::run
   3: generate_manifest::main
   4: std::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
   5: std::rt::lang_start::<()>::{closure#0}
   6: std::rt::lang_start_internal
   7: main
   8: <unknown>
   9: __libc_start_main
  10: _start
stack backtrace:
   0: __rustc::rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::result::unwrap_failed
   3: generate_manifest::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
```

tools/codegen/base/martin.json

@@ -4,6 +4,7 @@
   "license_markdown": "[MIT](https://github.com/maplibre/martin/blob/main/LICENSE-MIT) OR [Apache-2.0](https://github.com/maplibre/martin/blob/main/LICENSE-APACHE)",
   "tag_prefix": "martin-v",
   "rust_crate": "${package}",
+  "ignore": ["1.16.1"],
   "asset_name": "${package}-${rust_target}.tar.gz",
   "bin": ["${package}${exe}", "${package}-cp${exe}"],
   "version_range": ">= 1.0.0",