Bump actions/github-script from 7 to 8 (#5610)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/add-untriaged.yml

@@ -8,7 +8,7 @@ jobs:
   apply-label:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v7
+      - uses: actions/github-script@v8
         with:
           script: |
             github.rest.issues.addLabels({

.github/workflows/delete_backport_branch.yml

@@ -12,7 +12,7 @@ jobs:
     if: startsWith(github.event.pull_request.head.ref,'backport/') || startsWith(github.event.pull_request.head.ref,'release-chores/')
     steps:
       - name: Delete merged branch
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             github.rest.git.deleteRef({

CHANGELOG.md

@@ -38,6 +38,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Bump `net.bytebuddy:byte-buddy` from 1.17.6 to 1.17.7 ([#5586](https://github.com/opensearch-project/security/pull/5586))
 - Bump `io.dropwizard.metrics:metrics-core` from 4.2.33 to 4.2.34 ([#5589](https://github.com/opensearch-project/security/pull/5589))
 - Bump `com.nimbusds:nimbus-jose-jwt:9.48` from 9.48 to 10.4.2 ([#5595](https://github.com/opensearch-project/security/pull/5595))
+- Bump `actions/github-script` from 7 to 8 ([#5610](https://github.com/opensearch-project/security/pull/5610))
 
 ### Documentation