chore: Update Makefile variable names

Author: bartventer

Makefile

@@ -12,7 +12,7 @@ DRYRUN ?= "false"
 FEATURES ?= common-utils ## Feature to test. Default: 'common-utils'. Options: 'aws-cli', 'common-utils', 'docker-in-docker', 'docker-outside-of-docker', 'terraform'
 BASE_IMAGE ?= archlinux:base ## Base image for testing. Must be Arch Linux with 'pacman'. Default: 'archlinux:base'.
 PATH_TO_RUN ?= . ## Path to run the tests. Default: . (current directory). Change this in the Makefile or in the environment.
-FEATURES_FILTER ?= ## Filter for features. Default: empty. Change this in the Makefile or in the environment.
+SCENARIOS_FILTER ?= ## Filter for feature scenarios. Default: empty. Change this in the Makefile or in the environment.
 PRESERVE_TESTCONTAINERS ?= false ## Preserve test containers. Default: false. Change this in the Makefile or in the environment.
 
 # Devcontainer command
@@ -28,7 +28,7 @@ DC_TEST_AUTOGENERATED_FLAGS=--skip-scenarios \
 DC_TEST_SCENARIOS_FLAGS=-f $(FEATURES) \
 	--skip-autogenerated \
 	--skip-duplicated \
-	--filter $(FEATURES_FILTER) \
+	--filter $(SCENARIOS_FILTER) \
 	--preserve-test-containers $(PRESERVE_TESTCONTAINERS)
 
 SCRIPTSDIR=./scripts