Add CI creates issue updating dependencies

.github/ISSUE_TEMPLATE/update_dependencies.md

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+We need to update the dependencies of the Meilisearch repository, and, if possible, the dependencies of all the core-team repositories that Meilisearch depends on (milli, charabia, heed...).
+
+⚠️ This issue should only be done at the beginning of the sprint!

.github/workflows/create-issue-dependencies.yml

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+name: Create Issue "Upgrade dependencies"
+on:
+  schedule:
+    - cron: '0 0 1 */3 *'
+  workflow_dispatch:
+  
+jobs:
+  create-issue:
+    runs-on: ubuntu-latest
+    env:
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v1
+      - run: gh issue create --title "Upgrade dependencies" --label "dependencies,maintenance" --body-file ".github/ISSUE_TEMPLATE/update_dependencies.md"
+      
+