Update best-of update workflow to 0.4.6

Author: lukasmasuch

.github/workflows/update-best-of-list.yml

@@ -1,4 +1,4 @@
-# Based on https://github.com/ml-tooling/best-of-update-action/blob/v0.4.2/workflows/update-best-of-list.yml
+# Based on https://github.com/ml-tooling/best-of-update-action/blob/v0.4.6/workflows/update-best-of-list.yml
 name: update-best-of-list
 
 on:
@@ -24,6 +24,12 @@ jobs:
       - if: ${{ ! (env.VERSION != null && env.VERSION != '') }}
         name: set-version-via-date
         run: echo "VERSION=$(date '+%Y.%m.%d')" >> $GITHUB_ENV
+      - uses: actions/checkout@v2
+      - name: check-version-tag
+        shell: bash
+        run: |
+          git fetch --depth=1 origin +refs/tags/*:refs/tags/*
+          git show-ref --tags --verify --quiet -- "refs/tags/${{ env.VERSION }}" && echo "VERSION=$(date '+%Y.%m.%d-%H.%M')" >> $GITHUB_ENV || echo "Version tag has not been created yet."
       - name: create-update-branch
         uses: peterjgrainger/action-create-branch@v2.0.1
         env:
@@ -38,7 +44,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: update-best-of-list
-        uses: ml-tooling/best-of-update-action@v0.4.2
+        uses: ml-tooling/best-of-update-action@v0.4.6
         with:
           libraries_key: ${{ secrets.LIBRARIES_KEY }}
           github_key: ${{ secrets.GITHUB_TOKEN }}
@@ -71,4 +77,4 @@ jobs:
           release_name: "Update: ${{ env.VERSION  }}"
           body_path: "latest_changes.md"
           draft: true
-          prerelease: false
+          prerelease: false