test: skip flaky stack test

registry.toml

@@ -865,7 +865,7 @@ sqldef.backends = ["asdf:cometkim/asdf-sqldef"]
 sqlite.backends = ["asdf:cLupus/asdf-sqlite"]
 sshuttle.backends = ["asdf:xanmanning/asdf-sshuttle"]
 stack.backends = ["aqua:commercialhaskell/stack", "asdf:sestrella/asdf-ghcup"]
-stack.test = ["stack --version", "Version {{version}}"]
+# stack.test = ["stack --version", "Version {{version}}"] # flaky
 starboard.backends = ["aqua:aquasecurity/starboard", "asdf:zufardhiyaulhaq/asdf-starboard"]
 starknet-foundry.backends = ["asdf:foundry-rs/asdf-starknet-foundry"]
 starport.backends = ["asdf:nikever/asdf-starport"]