🌱 Don't close stale issues explicitly (#3513)

Issues are still getting closed after https://github.com/ossf/scorecard/pull/3493.
I assume there's a default value being used somewhere.

Signed-off-by: Spencer Schrock <sschrock@google.com>

.github/workflows/stale.yml

@@ -34,7 +34,7 @@ jobs:
     - uses: actions/stale@1160a2240286f5da8ec72b1c0816ce2481aabf84 # v3.0.18
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'Stale issue message - this issue will be closed in 7 days'
+        stale-issue-message: 'This issue is stale because it has been open for 60 days with no activity.'
         stale-pr-message: 'Stale pull request message'
         stale-issue-label: 'no-issue-activity'
         exempt-issue-labels: 'priority,bug,good first issue'
@@ -43,4 +43,5 @@ jobs:
         days-before-pr-stale: '10'
         days-before-pr-close: '20'
         days-before-issue-stale: '60'
+        days-before-issue-close: -1
         operations-per-run: '100'