fix url link

README.rst

@@ -240,7 +240,7 @@ header-only library so it doesn't provide any linkage options.
 Quick build
 ~~~~~~~~~~~~~~~~~
 
-You can download and install fmt using the [vcpkg](https://github.com/Microsoft/vcpkg) dependency manager::
+You can download and install fmt using the `vcpkg<https://github.com/Microsoft/vcpkg>`_ dependency manager::
 
     $ git clone https://github.com/Microsoft/vcpkg.git
     $ cd vcpkg
@@ -248,7 +248,7 @@ You can download and install fmt using the [vcpkg](https://github.com/Microsoft/
     $ ./vcpkg integrate install
     $ ./vcpkg install fmt
 
-The fmt port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.
+The fmt port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please `create an issue or pull request<https://github.com/Microsoft/vcpkg>`_ on the vcpkg repository.
 
 Running the tests
 ~~~~~~~~~~~~~~~~~