updating metadata

docs/api.rst

------
-API
------
-
-.. doxygenindex::

docs/how to/use-transferbench.rst

 .. meta::
   :description: TransferBench is a utility to benchmark simultaneous transfers between user-specified devices (CPUs or GPUs)
-  :keywords: Using TransferBench, TransferBench Usage, TransferBench How To, API, ROCm, documentation, HIP
+  :keywords: Using TransferBench, TransferBench Usage, TransferBench How To, TransferBench documentation, TransferBench user guide, TransferBench user manual
 
 .. _using-transferbench:
 

docs/index.rst

 .. meta::
   :description: TransferBench is a utility to benchmark simultaneous transfers between user-specified devices (CPUs or GPUs)
-  :keywords: TransferBench, API, ROCm, documentation, HIP
+  :keywords: TransferBench documentation
 
 ****************************
 TransferBench documentation

docs/reference/api.rst

 .. meta::
   :description: TransferBench is a utility to benchmark simultaneous transfers between user-specified devices (CPUs or GPUs)
-  :keywords: TransferBench API, TransferBench library, documentation, HIP
+  :keywords: TransferBench API library, TransferBench API
 
 .. _transferbench-api: