fix: use path = "." for self-referential dev-dependency

After the GitHub repo rename, the runner checks out into a directory
named after the repo, so ../tycho-execution no longer resolves.
Using path = "." is always correct regardless of checkout directory name.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

Took 43 seconds

# Commit time for manual adjustment:
# Took 5 minutes

Author: dianacarvalho1

Cargo.lock

@@ -50,7 +50,7 @@ typetag = { version = "0.2", optional = true }
 
 [dev-dependencies]
 rstest = "0.24.0"
-tycho-execution = { path = "../tycho-execution", features = ["test-utils"] }
+tycho-execution = { path = ".", features = ["test-utils"] }
 
 [features]
 default = ["evm"]