chore(workflows/{build,outer_link_check}): Fork リポジトリでは定期実行しない

Author: akinomyoga

.github/workflows/build.yml

@@ -19,6 +19,7 @@ on:
 
 jobs:
   build:
+    if: github.repository_owner == 'cpprefjp' || startsWith(inputs.arguments, '--pull ')
     runs-on: ubuntu-latest
     steps:
     - id: vars

.github/workflows/outer_link_check.yml

@@ -9,6 +9,7 @@ on:
 
 jobs:
   build:
+    if: github.repository_owner == 'cpprefjp'
     runs-on: ubuntu-latest
     steps:
     - name: Set up Python