build(deps): bump docker/library/golang from 1.19.5 to 1.20.6

Bumps docker/library/golang from 1.19.5 to 1.20.6.

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Dockerfile

@@ -15,7 +15,7 @@
 # limitations under the License.
 
 # Build the manager binary
-FROM public.ecr.aws/docker/library/golang:1.19.5 as toolchain
+FROM public.ecr.aws/docker/library/golang:1.20.6 as toolchain
 
 # Run this with docker build --build_arg $(go env GOPROXY) to override the goproxy
 ARG goproxy=https://proxy.golang.org