fix: add missing type in HTTPS_PROXY constant

Signed-off-by: Jorge Garcia Oncins <jgarciao@redhat.com>

Author: jgarciao

tests/llama_stack/constants.py

@@ -29,7 +29,7 @@ class ModelInfo(NamedTuple):
 
 
 IS_DISCONNECTED_CLUSTER: bool = os.getenv("IS_DISCONNECTED_CLUSTER", "false").lower() == "true"
-HTTPS_PROXY = os.getenv("SQUID_HTTPS_PROXY", "")
+HTTPS_PROXY: str = os.getenv("SQUID_HTTPS_PROXY", "")
 
 # LLS_CLIENT_VERIFY_SSL is false by default to be able to test with Self-Signed certificates
 LLS_CLIENT_VERIFY_SSL = os.getenv("LLS_CLIENT_VERIFY_SSL", "false").lower() == "true"