Update build-package.yml to exclude CODE_OF_CONDUCT*

Add CODE_OF_CONDUCT to exclusion regex to avoid repo/workflow auto-build process issues, ref: microcks/.github#16

Author: yada

.github/workflows/build-package.yml

@@ -5,12 +5,14 @@ on:
       - '.gitignore'
       - 'LICENSE'
       - 'README*'
+      - 'CODE_OF_CONDUCT*'
   pull_request:
     paths-ignore:
       - '.github/**'
       - '.gitignore'
       - 'LICENSE'
       - 'README*'
+      - 'CODE_OF_CONDUCT*'
 jobs:
   build-package-grpc-hello:
     runs-on: ubuntu-latest
@@ -201,4 +203,4 @@ jobs:
         if: github.repository_owner == 'microcks' && steps.changes.outputs.shift-left-demo-sb == 'true'
         run: |
           cd shift-left-demo/spring-boot-order-service-devtools
-          mvn -B clean package
+          mvn -B clean package