Add missing mixins to Forge

Add issues url to the mod
Add water hunting to avians

fabricmc/src/main/resources/fabric.mod.json

@@ -8,8 +8,9 @@
 		"${mod_author}"
 	],
 	"contact": {
-		"homepage": "https://fabricmc.net/",
-		"sources": "https://github.com/FabricMC/fabric-example-mod"
+		"homepage": "${homepage_url}",
+		"sources": "${sources_url}",
+		"issues": "${issue_url}"
 	},
 	"license": "${license}",
 	"icon": "jurassicrevived.png",