chore: aligns go version of benchmarks with tests

.github/workflows/benchmark.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v4
         with:
-          go-version: '>=1.18.0'      
+          go-version: '>=1.19.0'      
       - name: Install dependencies
         run: go get ./...
       # Run benchmark with `go test -bench` and stores the output to a file