fix(docs): pass missing arg to log_all_levels in logging_example_test

The contract declares `fn log_all_levels(value: Field)` but the test
called it with no args, causing nargo to abort. This blocks the entire
docs/examples workspace from running TXE tests via `aztec test`.

Caught while adding the counter_contract_test package: scoping `aztec
test` to `--package counter_contract_test` still compiles the whole
workspace and trips on this. One-character fix.

Author: critesjosh

docs/examples/contracts/logging_example_test/src/lib.nr

@@ -24,7 +24,7 @@ unconstrained fn test_public_logging() {
 #[test]
 unconstrained fn test_all_log_levels() {
     let (env, contract_address, owner) = setup();
-    env.call_private(owner, LoggingExample::at(contract_address).log_all_levels());
+    env.call_private(owner, LoggingExample::at(contract_address).log_all_levels(42));
 }
 
 #[test]