ci: Fix gemini cli issues triage (#3881)

Error:
```
Error: Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/home/runner/work/sdk-platform-java/sdk-platform-java'. Did you forget to run actions/checkout before running your local action?
```

From
https://github.com/googleapis/sdk-platform-java/actions/runs/16917097354/job/47933669808

Author: lqiu96

.github/workflows/gemini-issue-automated-triage.yml

@@ -47,7 +47,7 @@ jobs:
         uses: 'actions/checkout@v5'
 
       - name: 'Run Gemini Issue Triage'
-        uses: './'
+        uses: 'google-github-actions/run-gemini-cli@v0'
         id: 'gemini_issue_triage'
         env:
           GITHUB_TOKEN: '${{ steps.generate_token.outputs.token || secrets.GITHUB_TOKEN }}'

.github/workflows/gemini-issue-scheduled-triage.yml

@@ -2,7 +2,7 @@ name: '📋 Gemini Scheduled Issue Triage'
 
 on:
   schedule:
-    - cron: '0 * * * *' # Runs every hour
+    - cron: '0 0 * * *' # Runs every day
   workflow_dispatch:
 
 concurrency:
@@ -57,7 +57,7 @@ jobs:
       - name: 'Run Gemini Issue Triage'
         if: |-
           ${{ steps.find_issues.outputs.issues_to_triage != '[]' }}
-        uses: './'
+        uses: 'google-github-actions/run-gemini-cli@v0'
         id: 'gemini_issue_triage'
         env:
           GITHUB_TOKEN: '${{ steps.generate_token.outputs.token || secrets.GITHUB_TOKEN }}'