chore(build): no need for global redocly install

using npx, we can run all redocly commands without doing a global
install of redocly/cli (-g flag).

I also noticed we were using `latest` which outside of dev tests
is not recommended.

Some shorthand flags were also migrated to the long ones (--output).

Makefile

 .DEFAULT_GOAL := validate-build
-.PHONY: install bundle validate validate-build bundle-dereferenced spectral
+.PHONY: bundle validate validate-build bundle-dereferenced spectral
 
-install:
-	npm i -g @redocly/cli@latest
+pwd := $(shell pwd)
 
 bundle: backup
-	redocly bundle \
-		spec/submission-api.yaml \
-		-o dist/submission-api.yaml
+	npx @redocly/cli@^1.9.0 bundle \
+		--output dist/submission-api.yaml spec/submission-api.yaml
 
 validate:
-	redocly lint --extends=minimal spec/submission-api.yaml
+	npx @redocly/cli@^1.9.0 lint \
+		--extends=minimal spec/submission-api.yaml
 
 validate-build: bundle
-	redocly lint --extends=minimal  dist/submission-api.yaml
+	npx @redocly/cli@^1.9.0 lint \
+		--extends=minimal dist/submission-api.yaml
 
 bundle-dereferenced: backup
-	redocly bundle \
-	    --dereferenced \
-		spec/submission-api.yaml \
-		-o dist/submission-api.yaml
+	npx @redocly/cli@^1.9.0 bundle \
+		--dereferenced --output dist/submission-api.yaml spec/submission-api.yaml
 
 backup:
 	if [ -f dist/submission-api.yaml ]; then cp dist/submission-api.yaml dist/submission-api-before.yaml; fi
 
-pwd := $(shell pwd)
-
 spectral: bundle
 	docker run --rm --pull=always \
 		-v "$(pwd):/work" -w /work \