Bump DiscordRPC to v9 (#622)

Bumps DiscordRPC to match Plugin Interfaces / Plugins v4.

.github/workflows/release.yml

@@ -34,7 +34,7 @@ jobs:
           wget "https://github.com/R2Northstar/NorthstarLauncher/releases/download/${{ env.NORTHSTAR_VERSION }}/northstar-launcher.zip"
       - name: Download DiscordRPC plugin
         run:
-          wget "https://github.com/R2Northstar/NorthstarDiscordRPC/releases/download/v6/northstar-discord-rpc.zip"
+          wget "https://github.com/R2Northstar/NorthstarDiscordRPC/releases/download/v9/northstar-discord-rpc.zip"
       - name: Download compiled stubs
         run:
           wget "https://github.com/R2Northstar/NorthstarStubs/releases/download/v1/NorthstarStubs.zip"
@@ -96,9 +96,9 @@ jobs:
       - name: Compute SHA-512 checksum
         run: |
           sha512sum Northstar.release.${{ env.NORTHSTAR_VERSION }}.zip
-          echo "```" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
           sha512sum Northstar.release.${{ env.NORTHSTAR_VERSION }}.zip >> $GITHUB_STEP_SUMMARY
-          echo "```" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
       - name: Upload zip to release draft
         uses: softprops/action-gh-release@v1
         if: startsWith(github.ref, 'refs/tags/v') && !contains(env.NORTHSTAR_VERSION, '-rc')