updated clean

slides/Makefile

@@ -65,6 +65,6 @@ deploy: all
 	cp *.pdf algo_cours
 
 clean:
-	rm -f *.pdf *.markdown yq_linux_amd64* index.md .puppeteer.json
+	rm -f *.html *.pdf *.markdown yq_linux_amd64* index.md .puppeteer.json
 
 .PHONY:	clean index puppeteer yq