bench: reduce huge regex a bit

It looks like it blows the default regex size limit at the moment.

bench/src/rust_compile.rs

@@ -48,20 +48,20 @@ fn compile_small_full(b: &mut Bencher) {
 #[bench]
 fn compile_huge(b: &mut Bencher) {
     b.iter(|| {
-        let re = Parser::new().parse(r"\p{L}{100}").unwrap();
+        let re = Parser::new().parse(r"\p{L}{50}").unwrap();
         Compiler::new().size_limit(1 << 30).compile(&[re]).unwrap()
     });
 }
 
 #[bench]
 fn compile_huge_bytes(b: &mut Bencher) {
     b.iter(|| {
-        let re = Parser::new().parse(r"\p{L}{100}").unwrap();
+        let re = Parser::new().parse(r"\p{L}{50}").unwrap();
         Compiler::new().size_limit(1 << 30).bytes(true).compile(&[re]).unwrap()
     });
 }
 
 #[bench]
 fn compile_huge_full(b: &mut Bencher) {
-    b.iter(|| regex!(r"\p{L}{100}"));
+    b.iter(|| regex!(r"\p{L}{50}"));
 }