chore(deps): bump actions/checkout from 3 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
                   egress-policy: audit
 
             - name: Checkout Code
-              uses: actions/checkout@v3
+              uses: actions/checkout@v6
               with:
                   token: ${{ secrets.NPM_TOKEN }}
 

.github/workflows/container.yml

@@ -57,7 +57,7 @@ jobs:
         steps:
 
             - name: Checkout Code
-              uses: actions/checkout@v3
+              uses: actions/checkout@v6
 
             - name: Login to GitHub Container Registry
               uses: docker/login-action@v2

.github/workflows/email.yml

@@ -105,7 +105,7 @@ jobs:
 
             - name: Checkout Code
               if: inputs.attachment-flag
-              uses: actions/checkout@v3
+              uses: actions/checkout@v6
 
             - name: Handle Attachments
               if: inputs.attachment-flag

.github/workflows/node-publish.yml

@@ -42,7 +42,7 @@ jobs:
                   egress-policy: audit      # TODO: change to 'egress-policy: block' after a couple of runs
 
             - name: Checkout Code
-              uses: actions/checkout@v3
+              uses: actions/checkout@v6
               with:
                   persist-credentials: false