chore: fix readme links

Author: art049

README.md

@@ -10,6 +10,6 @@ Node.js libraries to create CodSpeed benchmarks
 
 This mono-repo contains the integration packages for using CodSpeed with Node.js:
 
-- [`@codspeed/tinybench-plugin`](./packages/tinybench-plugin/README.md): tinybench compatibility layer for CodSpeed
-- [`@codspeed/benchmark.js-plugin`](./packages/benchmark.js-plugin/README.md): Benchmark.js compatibility layer for CodSpeed
-- [`@codspeed/core`](./packages/core/README.md): The core library used to integrate with Codspeed runners
+- [`@codspeed/tinybench-plugin`](./packages/tinybench-plugin): tinybench compatibility layer for CodSpeed
+- [`@codspeed/benchmark.js-plugin`](./packages/benchmark.js-plugin): Benchmark.js compatibility layer for CodSpeed
+- [`@codspeed/core`](./packages/core): The core library used to integrate with Codspeed runners