ansible-inventories/bitegra#21 Rename master to main

bin/mdshow

@@ -117,7 +117,7 @@ $(MDSHOW_CONFIG)/pandoc/templates/metadata.extract:
 $(MDSHOW_CONFIG)/pandoc/templates/default.revealjs:
 	@[ ! -e $(dir $@) ] && mkdir -p $(dir $@) || true
 	[ ! -e $@ ] && \
-		curl -L https://gitlab.lakedrops.com/docker/mdshow/-/raw/master/default.revealjs -o $@
+		curl -L https://gitlab.lakedrops.com/docker/mdshow/-/raw/main/default.revealjs -o $@
 
 $(MDSHOW_CONFIG)/reveal.js/dist/Chart.bundle.min.js:
 	@[ ! -e $(dir $@) ] && mkdir -p $(dir $@) || true