build(deps): bump golang from 1.20.5 to 1.20.6 (#1587)

Bumps golang from 1.20.5 to 1.20.6.

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

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

Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.20.5@sha256:fd9306e1c664bd49a11d4a4a04e41303430e069e437d137876e9290a555e06fb AS builder
+FROM golang:1.20.6@sha256:8e5a0067e6b387263a01d06b91ef1a983f90e9638564f6e25392fd2695f7ab6c AS builder
 ENV APP_ROOT=/opt/app-root
 ENV GOPATH=$APP_ROOT
 
@@ -31,7 +31,7 @@ RUN CGO_ENABLED=0 go build -gcflags "all=-N -l" -ldflags "${SERVER_LDFLAGS}" -o
 RUN go test -c -ldflags "${SERVER_LDFLAGS}" -cover -covermode=count -coverpkg=./... -o rekor-server_test ./cmd/rekor-server
 
 # Multi-Stage production build
-FROM golang:1.20.5@sha256:fd9306e1c664bd49a11d4a4a04e41303430e069e437d137876e9290a555e06fb as deploy
+FROM golang:1.20.6@sha256:8e5a0067e6b387263a01d06b91ef1a983f90e9638564f6e25392fd2695f7ab6c as deploy
 
 # Retrieve the binary from the previous stage
 COPY --from=builder /opt/app-root/src/rekor-server /usr/local/bin/rekor-server