Update Go to 1.21

Signed-off-by: Chris Doherty <[email protected]>

.github/workflows/ci.yaml

@@ -6,8 +6,10 @@ on:
     tags-ignore:
       - "v*"
   pull_request:
+
 env:
   CGO_ENABLED: 0
+  GO_VERSION: '1.21'
 
 jobs:
   verify:
@@ -19,10 +21,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.20"
-
-      - name: goimports
-        run: go install golang.org/x/tools/cmd/goimports@latest && goimports -d . | (! grep .)
+          go-version: "${{ env.GO_VERSION }}"
 
       - name: make vet
         run: make vet
@@ -39,7 +38,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.20"
+          go-version: "${{ env.GO_VERSION }}"
 
       - name: Unit test
         run: make test

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM --platform=$BUILDPLATFORM golang:1.20 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.21 AS builder
 
 WORKDIR /workspace