[config] Fix license infos

.cdb.json

@@ -7,7 +7,7 @@
 	"tags": ["pvp", "pve", "survival", "multiplayer"],
 	"content_warnings": [],
 	"license": "GPL-3.0-or-later",
-	"media_license": "CC-BY-4.0",
+	"media_license": "CC-BY-SA-4.0",
 	"long_description": null,
 	"repo": "https://github.com/minetest-palamod/palamod",
 	"website": "https://github.com/minetest-palamod/palamod",

LICENSE

@@ -672,3 +672,6 @@ may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
+
+
+See README for textures credits.

README.md

@@ -38,6 +38,8 @@ This modpack is very WIP and breaking changes can be made with no warning. Use a
 
 This project is mostly a personal project, but I will accept pr for translation, bugfix and better textures.
 
+Textures are made by AFCM and are licensed under CC-BY-SA 4.0. Some of them are based on MineClone2 textures that are mostly based on Minecraft PixelPerfection texture pack.
+
 ## Gameplay
 
 ### Features