Fix punctuation in one of the itemlist item text

Author: oleksandr-pavlyk

docs/sphinx-combined/index.rst

@@ -31,7 +31,7 @@ It is designed to simplify CUDA kernel benchmarking. It features:
     * Executes the benchmark multiple times back-to-back and records total time.
     * Reports the average execution time (total time / number of executions).
 
-  * :ref:`CPU-only Measurements <cpu-only-benchmarks>`)
+  * :ref:`CPU-only Measurements <cpu-only-benchmarks>`:
 
     * Measures the host-side execution time of a non-GPU benchmark.
     * Not suitable for microbenchmarking.