refactor: Update advanced-issue-labeler to version 3 for severity label functionality

.github/advanced-issue-labeler.yml

@@ -2,8 +2,7 @@
 # Keep up to date with workflows/issue-create.yml !!!
 
 policy:
-  - template: [bug_report.yml]
-    section:
+  - section:
       - id: [severity]
         label:
           - name: 'kind: low severity'

.github/workflows/issue-create.yml

@@ -28,11 +28,8 @@ jobs:
           template-path: .github/ISSUE_TEMPLATE/bug_report.yml
 
       - name: Set labels based on severity field
-        uses: redhat-plumbers-in-action/advanced-issue-labeler@v2
+        uses: redhat-plumbers-in-action/advanced-issue-labeler@v3
         with:
           issue-form: ${{ steps.issue-parser.outputs.jsonString }}
           token: ${{ secrets.GITHUB_TOKEN }}
           section: severity
-          block-list: |  # <-- this value needs to be set (workaround)
-            None
-