chore(deps): update bindgen requirement from 0.68.1 to 0.71.1

Updates the requirements on [bindgen](https://github.com/rust-lang/rust-bindgen) to permit the latest version.
- [Release notes](https://github.com/rust-lang/rust-bindgen/releases)
- [Changelog](https://github.com/rust-lang/rust-bindgen/blob/main/CHANGELOG.md)
- [Commits](rust-lang/rust-bindgen@v0.68.1...v0.71.1)

---
updated-dependencies:
- dependency-name: bindgen
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -24,7 +24,7 @@ skeptic = "0.13"
 
 [build-dependencies]
 anyhow = "1"
-bindgen = "0.68.1"
+bindgen = "0.71.1"
 cc = "1.0"
 skeptic = "0.13"
 

build.rs

@@ -200,7 +200,7 @@ fn generate_bindings(defines: &[(&str, &str)], includes: &[PathBuf]) -> Result<S
         .no_copy("_zend_array")
         .no_debug("_zend_function_entry") // On Windows when the handler uses vectorcall, Debug cannot be derived so we do it in code.
         .layout_tests(env::var("EXT_PHP_RS_TEST").is_ok())
-        .rust_target(RustTarget::Nightly);
+        .rust_target(RustTarget::nightly());
 
     for binding in ALLOWED_BINDINGS.iter() {
         bindgen = bindgen