The AWS load balancer is messing things up (#5133)

Author: retorquere

.github/workflows/merge.yaml

@@ -94,5 +94,5 @@ jobs:
     - name: ping distribution-updater
       if: github.repository == 'citation-style-language/styles'
       run: |
-        curl -H "Authorization: $DISTRIBUTION_UPDATER_TOKEN" -F 'payload={"type":"pull_request","branch":"master","status":0,"commit":"'$GITHUB_SHA'"}' https://styles-update.zotero.org:8826/
-        curl -H "Authorization: $DISTRIBUTION_UPDATER_TOKEN" -F 'payload={"type":"pull_request","branch":"master","status":0,"commit":"'$GITHUB_SHA'"}' https://styles-update.zotero.org:8827/
+        curl -H 'Content-Length:' -H "Authorization: $DISTRIBUTION_UPDATER_TOKEN" -F 'payload={"type":"pull_request","branch":"master","status":0,"commit":"'$GITHUB_SHA'"}' https://styles-update.zotero.org:8826/
+        curl -H 'Content-Length:' -H "Authorization: $DISTRIBUTION_UPDATER_TOKEN" -F 'payload={"type":"pull_request","branch":"master","status":0,"commit":"'$GITHUB_SHA'"}' https://styles-update.zotero.org:8827/