docs: improve formatting in rai_bench README by adding backticks around class names

Author: pawel-kotowski

src/rai_bench/README.md

@@ -110,7 +110,7 @@ The Tool Calling Agent Benchmark is the benchmark for LangChain tool calling age
 
 -   [Tool Calling Agent Benchmark](rai_bench//tool_calling_agent/benchmark.py) - Benchmark for LangChain tool calling agents
 -   [Scores tracing](rai_bench/results_processing/langfuse_scores_tracing.py) - Component handling sending scores to tracing backends
--   [Interfaces](rai_bench//tool_calling_agent/interfaces.py) - Interfaces for validation classes - Task, Validator, SubTask
+-   [Interfaces](rai_bench//tool_calling_agent/interfaces.py) - Interfaces for validation classes - `Task`, `Validator`, `SubTask`
 
     For detailed description of validation visit -> [Validation](./rai_bench/docs/tool_calling_agent_benchmark.md)