Bump golang from 1.20.3 to 1.20.4 (#1142)

Author: dependabot[bot]

Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.20.3@sha256:403f48633fb5ebd49f9a2b6ad6719f912df23dae44974a0c9445be331e72ff5e AS builder
+FROM golang:1.20.4@sha256:6dd5c5f8936d7d4487802fb10a77f31b1776740be0fc17ada1acb74ac958f7be AS builder
 ENV APP_ROOT=/opt/app-root
 ENV GOPATH=$APP_ROOT
 
@@ -28,7 +28,7 @@ RUN go build -o server main.go
 RUN CGO_ENABLED=1 go build -gcflags "all=-N -l" -o server_debug main.go
 
 # Multi-Stage production build
-FROM golang:1.20.3@sha256:403f48633fb5ebd49f9a2b6ad6719f912df23dae44974a0c9445be331e72ff5e as deploy
+FROM golang:1.20.4@sha256:6dd5c5f8936d7d4487802fb10a77f31b1776740be0fc17ada1acb74ac958f7be as deploy
 
 # Retrieve the binary from the previous stage
 COPY --from=builder /opt/app-root/src/server /usr/local/bin/fulcio-server

Dockerfile.ctfe_init

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.20.3@sha256:403f48633fb5ebd49f9a2b6ad6719f912df23dae44974a0c9445be331e72ff5e AS builder
+FROM golang:1.20.4@sha256:6dd5c5f8936d7d4487802fb10a77f31b1776740be0fc17ada1acb74ac958f7be AS builder
 
 WORKDIR /root/