Update Workflow Versions to Remove node16 Deprecation Warnings (#437)

### Changes

1. In accordance with [3] of [this PR](yext/slapshot-reusable-workflows#37), we updated `coverage.yml` to use `actions/download-artifact@v4`. 

2. `main.yml`, and `update-snapshots.yml` actions of this repo were also updated to stop the node 16 deprecation warnings

3. Bumped versions for [peter-evans/create-or-update-comment](https://github.com/peter-evans/create-or-update-comment/releases) to v4, [peter-evans/find-comment](https://github.com/peter-evans/find-comment/releases) to v3, and [actions/github-script](https://github.com/actions/github-script/releases?page=3) to v7.

.github/workflows/coverage.yml

@@ -21,9 +21,9 @@ jobs:
     runs-on: ubuntu-latest
     needs: combined_coverage
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Download the current coverage
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: coverage
           path: coverage/
@@ -43,14 +43,14 @@ jobs:
           coverage-file: coverage/lcov.info
         id: parse-combined-coverage
       - name: Find Comment
-        uses: peter-evans/find-comment@v2
+        uses: peter-evans/find-comment@v3
         id: fc
         with:
           issue-number: ${{ github.event.pull_request.number }}
           comment-author: 'github-actions[bot]'
           body-includes: Current visual coverage
       - name: Create/Update Comment
-        uses: peter-evans/create-or-update-comment@v2
+        uses: peter-evans/create-or-update-comment@v4
         with:
           comment-id: ${{ steps.fc.outputs.comment-id }}
           issue-number: ${{ github.event.pull_request.number }}

.github/workflows/main.yml

@@ -21,5 +21,5 @@ jobs:
       image: returntocorp/semgrep
     if: (github.actor != 'dependabot[bot]')
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: semgrep ci

.github/workflows/update_snapshots.yml

@@ -6,11 +6,11 @@ jobs:
   update_snapshots:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref }}
           token: ${{ secrets.BOT_REPO_SCOPED_TOKEN }}
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: 18.x
           registry-url: 'https://registry.npmjs.org'
@@ -31,7 +31,7 @@ jobs:
           default_author: github_actions
       - name: Fail job if push changes
         if: steps.push-changes.outputs.pushed == 'true'
-        uses: actions/github-script@v3
+        uses: actions/github-script@v7
         with:
           script: |
             core.setFailed('Snapshot updates were made. A new commit with new snapshots was pushed.')