Fixed a syntax issue

Author: javiereguiluz

service_container/tags.rst

@@ -64,7 +64,7 @@ tag: the container sees that your class extends ``AbstractExtension`` (or more a
 that it implements ``ExtensionInterface``) and adds the tag for you.
 
 If you want to apply tags automatically for your own services, use the
-``_instanceof`` option::
+``_instanceof`` option:
 
 .. configuration-block::
 

weblink.rst

@@ -99,9 +99,8 @@ issuing an early separate HTTP request, use the ``nopush`` option:
 Resource Hints
 --------------
 
-`Resource Hints <https://www.w3.org/TR/resource-hints/#resource-hints>`_ are
-used by applications to help browsers when deciding which resources should be
-downloaded, preprocessed or connected to first.
+Resource Hints are used by applications to help browsers when deciding which
+resources should be downloaded, preprocessed or connected to first.
 
 The WebLink component provides the following Twig functions to send those hints: