Merge pull request #4 from flathub/sam/metainfo-updates

Two small metainfo.xml updates

net.purrdata.PurrData.metainfo.xml

@@ -4,7 +4,7 @@
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0+ and BSD-3-Clause</project_license>
   <name>Purr Data</name>
-  <summary>An open source visual programming language for multimedia</summary>
+  <summary>An open source visual programming language for multimedia, based on Pure Data</summary>
   <description>
     <p>
       This package contains Purr Data, which is a fork of Pure Data that
@@ -12,7 +12,7 @@
       user interface.
     </p>
     <p>
-        <em>IMPORTANT</em>: Running Pure Data under Flatpak is experimental.
+        IMPORTANT: Running Purr Data under Flatpak is experimental.
         The following are known limitations.
     </p>
     <ul>