[Docs] Fix broken link in README.rst

Signed-off-by: Kailun Qin <kailun.qin@intel.com>

README.rst

@@ -52,8 +52,10 @@ The official Gramine documentation can be found at
 https://gramine.readthedocs.io. Below are quick links to some of the most
 important pages:
 
-- `Quick start and how to run applications
-  <https://gramine.readthedocs.io/en/latest/quickstart.html>`__
+- `Gramine installation options
+  <https://gramine.readthedocs.io/en/latest/installation.html>`__
+- `Run a sample application
+  <https://gramine.readthedocs.io/en/latest/run-sample-application.html>`__
 - `Complete building instructions
   <https://gramine.readthedocs.io/en/latest/devel/building.html>`__
 - `Gramine manifest file syntax