Fix code static analysis issues

Author: atheo89

.github/workflows/create-release.yaml

@@ -2,7 +2,7 @@
 name: Create release
 permissions:
   contents: write
-on:
+on:  # yamllint disable-line rule:truthy
   workflow_dispatch:
     inputs:
       release_tag:

.github/workflows/notebooks-release.yaml

@@ -140,4 +140,3 @@ jobs:
       release_tag: ${{ github.event.inputs.release_tag }}
       release_name: ${{ github.event.inputs.release_name }}
       branch: ${{ github.event.inputs.branch }}
-      

Makefile

@@ -39,7 +39,7 @@ WHERE_WHICH ?= which
 
 # linux/amd64 or darwin/arm64
 OS_ARCH=$(shell go env GOOS)/$(shell go env GOARCH)
-BUILD_ARCH=linux/amd64
+BUILD_ARCH ?= linux/amd64
 
 IMAGE_TAG		 ?= $(RELEASE)_$(DATE)
 KUBECTL_BIN      ?= bin/kubectl