Add gungraun to benchmarking section

Author: gamma0987

data/crates.json

@@ -396,6 +396,9 @@
                             }, {
                                 "name": "divan",
                                 "notes": "Simple yet powerful benchmarking library with allocation profiling"
+                            }, {
+                                "name": "gungraun",
+                                "notes": "High-precision, one-shot and consistent benchmarking framework/harness for Rust. All Valgrind tools at your fingertips."
                             }, {
                                 "name": "hyperfine",
                                 "link": "https://github.com/sharkdp/hyperfine#hyperfine",