Update golang Docker tag to v1.21

renovate[bot] · web-flow · commit 4dad630d3912 · 2023-08-09T19:28:49.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.20 as builder
+FROM golang:1.21 as builder
 ARG TARGETOS
 ARG TARGETARCH
 
