Bump golang from 1.21.2 to 1.21.3

Bumps golang from 1.21.2 to 1.21.3.

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

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.21.2@sha256:e9ebfe932adeff65af5338236f0b0604c86b143c1bff3e1d0551d8f6196ab5c5 AS builder
+FROM golang:1.21.3@sha256:4d5cf6cb9269c5867ccf86b8282897b7eb4764d9739b1a19d8cc68643bbc3f3c 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:1.21.2@sha256:e9ebfe932adeff65af5338236f0b0604c86b143c1bff3e1d0551d8f6196ab5c5 as deploy
+FROM golang:1.21.3@sha256:4d5cf6cb9269c5867ccf86b8282897b7eb4764d9739b1a19d8cc68643bbc3f3c 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:1.21.2@sha256:e9ebfe932adeff65af5338236f0b0604c86b143c1bff3e1d0551d8f6196ab5c5 AS builder
+FROM golang:1.21.3@sha256:4d5cf6cb9269c5867ccf86b8282897b7eb4764d9739b1a19d8cc68643bbc3f3c AS builder
 
 WORKDIR /root/