Fix: fix the contradictory issue search query in gemini-scheduled-triage (#500)

Fixes #499.

This PR fixes the contradictory search query used by
`gemini-scheduled-triage` when collecting issues to triage.

### What changed

Updated the query from:

`no:label label:"status/needs-triage"`

to:

`no:label OR label:"status/needs-triage"`

in both:

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

Co-authored-by: Emily Hedlund <ehedlund@google.com>

Author: ShenaoW

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

@@ -73,7 +73,7 @@ jobs:
           echo '🔍 Finding unlabeled issues and issues marked for triage...'
           ISSUES="$(gh issue list \
             --state 'open' \
-            --search 'no:label label:"status/needs-triage"' \
+            --search 'no:label OR label:"status/needs-triage"' \
             --json number,title,body \
             --limit '100' \
             --repo "${GITHUB_REPOSITORY}"

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

@@ -73,7 +73,7 @@ jobs:
           echo '🔍 Finding unlabeled issues and issues marked for triage...'
           ISSUES="$(gh issue list \
             --state 'open' \
-            --search 'no:label label:"status/needs-triage"' \
+            --search 'no:label OR label:"status/needs-triage"' \
             --json number,title,body \
             --limit '100' \
             --repo "${GITHUB_REPOSITORY}"