Switch to currently supported redocly cli

Switches from outdated package to currently supported @redocly/cli package. This will provide same functionality, and is functionally a security update.

Makefile

@@ -2,7 +2,6 @@ setup:;
 	yarn install --frozen-lockfile
 clean:;
 	rm -rf tmp
-build: setup clean;
-	yarn build-specs
+build: clean setup;
 run-local: build;
 	hugo server
\ No newline at end of file