chore(ci): ignore contributors workflow in build triggers

Author: CalvinAllen

.github/workflows/build.yml

@@ -11,6 +11,7 @@ on:
       - '.github/ISSUE_TEMPLATE/**'
       - '.github/workflows/generate-changelog.yml'
       - '.github/workflows/preview-changelog.yml'
+      - '.github/workflows/contributors.yml'
       - '.idea/**'
       - '.claude/**'
       - '.gitignore'
@@ -30,6 +31,7 @@ on:
       - '.github/ISSUE_TEMPLATE/**'
       - '.github/workflows/generate-changelog.yml'
       - '.github/workflows/preview-changelog.yml'
+      - '.github/workflows/contributors.yml'
       - '.idea/**'
       - '.claude/**'
       - '.gitignore'