chore(ci): correct github-script API calls

Since V5 of github-script the Octokit context available via `github` no
longer has REST methods directly on it, they were moved to
`github.rest.*` instead. Update the references in delete-comments.yml
job to match.

Signed-off-by: Dominic Evans <[email protected]>

Author: dnwe

.github/workflows/delete-comments.yml

@@ -26,7 +26,7 @@ jobs:
         with:
           script: |
             const commentId = context.payload.comment.id;
-            await github.issues.deleteComment({
+            await github.rest.issues.deleteComment({
               owner: context.repo.owner,
               repo: context.repo.repo,
               comment_id: commentId
@@ -38,7 +38,7 @@ jobs:
         with:
           script: |
             const userId = context.payload.comment.user.id;
-            await github.users.block({
+            await github.rest.users.block({
               owner: context.repo.owner,
               repo: context.repo.repo,
               user_id: userId