Minor: empty instead of null in yaml [ci skip]

src/serena/resources/project.template.yml

@@ -111,6 +111,6 @@ default_modes:
 # (contrary to the memories, which are loaded on demand).
 initial_prompt: ""
 
-# Override of the corresponding setting in serena_config.yml, see the documentation there.
+# override of the corresponding setting in serena_config.yml, see the documentation there.
 # If null or missing, the value from the global config is used.
-symbol_info_budget: null
+symbol_info_budget:

src/serena/resources/serena_config.template.yml

@@ -108,7 +108,7 @@ default_max_tool_answer_chars: 150000
 # estimate the token count using the Claude Sonnet 4 tokenizer.
 token_count_estimator: CHAR_COUNT
 
-# Time budget (seconds) for requests when tools request symbol info (currently
+# time budget (seconds) for requests when tools request symbol info (currently
 # only supported for LSP-based tools).
 # If the budget is exceeded, Serena stops issuing further symbol-info-related
 # requests and returns partial info results.