Update copy for Container

Author: federicobucchi

_data/new-data/install/linux/releases.yml

@@ -28,7 +28,7 @@ latest-release:
         copy: "Editors"
   container:
     pre-code-text: |-
-      If you prefer a containerized environment, you can download the official container images for compiling and running Swift on a variety of distributions.
+      Official container images are available for compiling and running Swift on a variety of distributions.
     headline: Container
     links:
       - href: 'https://hub.docker.com/_/swift'

_includes/new-includes/components/linux-releases.html

@@ -14,7 +14,7 @@
         <div class="code-box content-wrapper">
           <h2>Container</h2>
           <p class="body-copy">
-            If you prefer a containerized environment, you can download the official container images for compiling and running Swift on a variety of distributions.
+            Official container images are available for compiling and running Swift on a variety of distributions.
           </p>
           <div class="link-wrapper">
             <a href="https://hub.docker.com/_/swift" class="body-copy">{{ site.data.builds.swift_releases.last.name }}-{{include.docker_tag}}</a>

install/windows/index.md

@@ -45,7 +45,7 @@ title: Install Swift - Windows
         <div class="code-box content-wrapper">
           <h2>Container</h2>
           <p class="body-copy">
-            If you prefer a containerized environment, you can download the official container images for compiling and running Swift on a variety of distributions.
+            Official container images are available for compiling and running Swift on a variety of distributions.
           </p>
           <div class="link-wrapper">
             <div class="link-single">