Change the action that creates the release in release-build.yml

Author: ajkyffin

.github/workflows/release-build.yml

@@ -65,7 +65,7 @@ jobs:
         if: ${{ github.ref == 'refs/heads/master' }}
 
       - name: Create/update release
-        uses: johnwbyrd/update-release@v1.0.0
+        uses: IsaacShelton/update-existing-release@v1.3.4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           files: ./datagateway-download-api-${{ env.VERSION }}-distro.zip