Try to prevent HTTP 406 errors instead of simply ignoring them

.github/workflows/build-deploy.yml

@@ -117,7 +117,7 @@ jobs:
       - name: run htmlproofer
         # ignore HTTP status 301 (htmlproofer strips trailing slashes)
         run: |
-          htmlproofer --allow-missing-href --ignore-missing-alt --ignore-files '/\/uikit\/tests\//' --ignore-status-codes '301,403,406,503' --cache '{"timeframe": {"external": "30d"}}' --ignore-url '/germplasm-map.legumeinfo.org/,/pgrc-rpc.agr.gc.ca\/gringlobal\/search/'
+          htmlproofer --allow-missing-href --ignore-missing-alt --ignore-files '/\/uikit\/tests\//' --ignore-status-codes '301,403,406,503' --cache '{"timeframe": {"external": "30d"}}' --ignore-url '/germplasm-map.legumeinfo.org/,/pgrc-rpc.agr.gc.ca\/gringlobal\/search/' --typhoeus='{"headers":{"Accept":"*/*"}}'
       # https://github.com/actions/cache/blob/main/save/README.md#always-save-cache
       - uses: actions/cache/save@v4
         id: save-cache-htmlproofer

Makefile

@@ -65,7 +65,7 @@ yamllint:
 
 htmlproofer:
 	bundle exec jekyll build --profile --trace
-	bundle exec htmlproofer $(HTMLPROOFER_ARGS) --ignore-status-codes 301,406,429,503 --ignore-files '/\/uikit\/tests\//' --ignore-url '/germplasm-map.legumeinfo.org/,/pgrc-rpc.agr.gc.ca\/gringlobal\/search/'  --cache '{"timeframe": {"external": "30d"}}' --log-level debug ./_site
+	bundle exec htmlproofer $(HTMLPROOFER_ARGS) --ignore-status-codes 301,429,503 --ignore-files '/\/uikit\/tests\//' --ignore-url '/germplasm-map.legumeinfo.org/,/pgrc-rpc.agr.gc.ca\/gringlobal\/search/'  --cache '{"timeframe": {"external": "30d"}}' --typhoeus='{"headers":{"Accept":"*/*"}}' --log-level debug ./_site
 
 pa11y: setup
 	if ! { command -v pa11y-ci || npm ls pa11y-ci ; } >/dev/null 2>&1; then npm install $(NPM_INSTALL_OPTIONS) pa11y-ci@${PA11YCI_VERSION}; fi