chore(deps): update golang:1.21 docker digest to 5206873

Author: ur-renovate

Dockerfile

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 # Specify the version of Go to use
-FROM golang:1.21@sha256:19600fdcae402165dcdab18cb9649540bde6be7274dedb5d205b2f84029fe909 as builder
+FROM golang:1.21@sha256:520687355000760907fa2d95c3387114fe72a2fb5873e6803d03bdf0e8ef35fa as builder
 
 RUN apt-get update && apt-get install -y xz-utils && rm -rf /var/lib/apt/lists/*