Add workflow_dispatch trigger to build workflow

Author: springrain

.github/workflows/build.yaml

@@ -1,4 +1,4 @@
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 name: Benchmark
 jobs:
   Build:
@@ -21,4 +21,4 @@ jobs:
     - name: Build Benchmarker
       run: go build main.go
     - name: Run Benchmarker
-      run: ./main -source="host=localhost user=postgres password=postgres dbname=test sslmode=disable" -orm=all -debug=false
+      run: ./main -source="host=localhost user=postgres password=postgres dbname=test sslmode=disable" -orm=all -debug=false