build: Announce releases in Discord (eslint#136)

Author: nzakas

.github/workflows/release-please.yml

@@ -45,7 +45,7 @@ jobs:
                   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
             - name: Post release announcement
-              run: npx @humanwhocodes/crosspost -t -b -m --file social-post.txt
+              run: npx @humanwhocodes/crosspost -t -b -m --discord-webhook --file social-post.txt
               if: ${{ steps.release.outputs.release_created }}
               env:
                   TWITTER_API_CONSUMER_KEY: ${{ secrets.TWITTER_CONSUMER_KEY }}
@@ -57,3 +57,4 @@ jobs:
                   BLUESKY_IDENTIFIER: ${{ vars.BLUESKY_IDENTIFIER }}
                   BLUESKY_PASSWORD: ${{ secrets.BLUESKY_PASSWORD }}
                   BLUESKY_HOST: ${{ vars.BLUESKY_HOST }}
+                  DISCORD_WEBHOOK_URL: ${{ secrets.DISCORD_WEBHOOK_URL }}