[gnome-software.wiki] Update Software metadata

[Will Thompson <wjt src gnome org>]

commit 972a06c3099b4d7c0358d9507cdf37c0f4f13e5b
Author: Will Thompson <will willthompson co uk>
Date:   Wed Aug 18 13:16:46 2021 +0000

    Update Software metadata

 Software-metadata.md | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/Software-metadata.md b/Software-metadata.md
index b69eccd..df5c106 100644
--- a/Software-metadata.md
+++ b/Software-metadata.md
@@ -47,7 +47,9 @@ TODO
 How to add missing hardware information
 ---
 
-TODO
+- TODO
+- See [this blog 
post](https://tecnocode.co.uk/2021/07/12/add-metadata-to-your-app-to-say-what-inputs-and-display-sizes-it-supports/).
+- Unfortunately this data, if present, is currently [stripped by 
Flathub](https://github.com/flathub/flathub/issues/2439).
 
 How to add missing content rating information
 ---
@@ -57,7 +59,8 @@ TODO
 How to fix incorrect licensing information
 ---
 
-TODO
+- [Don’t (generally) put documentation license in 
appdata](https://tecnocode.co.uk/2021/07/05/dont-generally-put-cc-by-sa-in-appdata/)
+- TODO
 
 How to fix incorrect safety and permissions information
 ---