Update docs generation instruction (#226)

* Improve README instructions to build docs.

Co-authored-by: Sergey Pokhodenko <sergey.pokhodenko@intel.com>

Author: diptorupd

docs/README.md

@@ -3,11 +3,13 @@ What?
 
 Generator scripts for dpCtl API documentation. To run these scripts, follow
 the following steps:
-
-`mkdir build` <br/>
-`cd build` <br/>
-`cmake -DDPCTL_DOCGEN_PREFIX=<WHERE_YOU_WANT_DOCS_TO_BE_GENERATED>` <br/>
-`make Sphinx` <br/>
+```bash
+cd dpctl/docs
+mkdir build
+cd build
+cmake -DDPCTL_DOCGEN_PREFIX=<WHERE_YOU_WANT_DOCS_TO_BE_GENERATED> ..
+make Sphinx
+```
 
 The `DPCTL_DOCGEN_PREFIX` flag is optional and can be omitted to generate the
 documents in the current source directory in a sub-directory called
@@ -25,4 +27,4 @@ packages installed:
 - sphinx
 - doxygen
 - breathe
-- exhale
+- exhale