fix: don't mark string freeze issues as stale (#62887)

btw github speak 'issues' means prs and issues

Co-authored-by: casswedson <[email protected]>

.github/workflows/stale.yml

@@ -25,8 +25,8 @@ jobs:
           start-date: '2020-05-07'
           ascending: ${{ contains(fromJson('["01", "03", "05", "07", "09", "11"]'), env.time) }}
           operations-per-run: 250
-          exempt-issue-labels: '<Bug>,<Bugfix>,<Crash / Freeze>,Organization: Bounty,Good First Issue,(P1 - Critical),(P2 - High),(P3 - Medium),(P4 - Low),(P5 - Long-term),(S2 - Confirmed),0.E Feature Freeze,0.E Content Freeze,0.F Feature Freeze,0.F Content Freeze,0.F String Freeze,0.G Feature Freeze,0.G Content Freeze'
-          exempt-pr-labels: '<Bug>,<Bugfix>,<Crash / Freeze>,Organization: Bounty,Good First Issue,(P1 - Critical),(P2 - High),(P3 - Medium),(P4 - Low),(P5 - Long-term),(S2 - Confirmed),0.E Feature Freeze,0.E Content Freeze,0.F Feature Freeze,0.F Content Freeze,0.F String Freeze,0.G Feature Freeze,0.G Content Freeze'
+          exempt-issue-labels: '<Bug>,<Bugfix>,<Crash / Freeze>,Organization: Bounty,Good First Issue,(P1 - Critical),(P2 - High),(P3 - Medium),(P4 - Low),(P5 - Long-term),(S2 - Confirmed),0.E Feature Freeze,0.E Content Freeze,0.F Feature Freeze,0.F Content Freeze,0.F String Freeze,0.G Feature Freeze,0.G Content Freeze,0.G String Freeze'
+          exempt-pr-labels: '<Bug>,<Bugfix>,<Crash / Freeze>,Organization: Bounty,Good First Issue,(P1 - Critical),(P2 - High),(P3 - Medium),(P4 - Low),(P5 - Long-term),(S2 - Confirmed),0.E Feature Freeze,0.E Content Freeze,0.F Feature Freeze,0.F Content Freeze,0.F String Freeze,0.G Feature Freeze,0.G Content Freeze,0.G String Freeze'
           exempt-all-milestones: true
           exempt-all-assignees: true
       - name: Print outputs