build(deps): bump golang from 1.19.4 to 1.20.4 (#1436)

Bumps golang from 1.19.4 to 1.20.4.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19.4 AS build
+FROM golang:1.20.4 AS build
 WORKDIR /go/src/github.com/aquasecurity/kube-bench/
 COPY makefile makefile
 COPY go.mod go.sum ./

Dockerfile.ubi

@@ -1,4 +1,4 @@
-FROM golang:1.19.4 AS build
+FROM golang:1.20.4 AS build
 WORKDIR /go/src/github.com/aquasecurity/kube-bench/
 COPY makefile makefile
 COPY go.mod go.sum ./