fix: add assertion type names to Vale vocabulary

Adds status_code, json_equal, header_equal, etc. to the accept
list so Vale doesn't flag them as spelling errors.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: slayerjain <shubhamkjain@outlook.com>

Author: slayerjain

vale_styles/config/vocabularies/Base/accept.txt

@@ -72,3 +72,15 @@ json_contains
 json_path
 substring
 keploy-runner
+status_code
+status_code_class
+status_code_in
+json_equal
+json_contains
+json_path
+header_equal
+header_contains
+header_exists
+header_matches
+custom_functions
+expected_string