fix: extract repository name from github.repository

Use github.repository and parse with cut command since
github.repository_name is not available in Gitea Actions.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitea/workflows/notify.yml

@@ -7,7 +7,9 @@ jobs:
     steps:
       - name: Send to NTFY
         run: |
-          REPO="${{ github.repository_name }}"
+          FULL_REPO="${{ github.repository }}"
+          # 从 owner/repo 格式中提取仓库名称
+          REPO=$(echo "$FULL_REPO" | cut -d'/' -f2)
           SHA="${{ github.sha }}"
           MSG="${{ github.event.head_commit.message }}"
           AUTHOR="${{ github.actor }}"
@@ -24,6 +26,6 @@ jobs:
           🌿 Branch: $BRANCH" \
             -H "Title: Git Push Notification" \
             -H "Priority: default" \
-            -H "Tags: gitea,push,${{ github.repository_name }}" \
+            -H "Tags: gitea,push,$REPO" \
             -H "Authorization: Bearer ${{ secrets.NTFY_TOKEN }}" \
             https://ntfy.server10086.icu/gitea