updating links

Author: neelgala

README.rst

@@ -1,8 +1,11 @@
 RISCV-Config
-========
+==============
 
 RISC-V Configuration Validator 
 
 LICENSE: BSD-3 Clause.
 
-Latest Documentation of RISCV-Config:   `PDF  <https://github.com/riscv/riscv-config/releases/latest/download/riscv_config.pdf>`_
+Latest Documentation of RISCV-Config:
+
+  * `HTML <https://riscv-config.readthedocs.io/>`_
+  * `PDF  <https://github.com/riscv/riscv-config/releases/latest/download/riscv_config.pdf>`_