poddefaults: Bump golang to 1.20 (#7338)

Signed-off-by: Kimonas Sotirchos <kimwnasptd@gmail.com>

.github/workflows/poddefaults_unit_test.yaml

@@ -14,10 +14,10 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v3
       with:
-        go-version: '1.17'
+        go-version: '1.20'
         check-latest: true
 
     - name: Run unit tests
       run: |
         cd components/admission-webhook
-        make test
+        make test

components/admission-webhook/go.mod

@@ -1,6 +1,6 @@
 module github.com/kubeflow/kubeflow/components/admission-webhook
 
-go 1.17
+go 1.20
 
 require (
 	github.com/mattbaird/jsonpatch v0.0.0-20171005235357-81af80346b1a