Update gitignore for Rider, fix typos

I use Rider as my IDE and when working with Unreal projects it installs a plugin that enable its unique integration. We don't want that being uploaded to the repo so it gets ignored. In addition, The project module has a typo, this commit fixes that

Cog.uproject

@@ -1,6 +1,6 @@
 {
 	"FileVersion": 3,
-	"EngineAssociation": "5.1",
+	"EngineAssociation": "{3A102A73-4E1B-A4EE-9D23-BC868A1B3015}",
 	"Category": "",
 	"Description": "",
 	"Modules": [
@@ -10,17 +10,17 @@
 			"LoadingPhase": "Default"
 		}
 	],
-  "Plugins": [
-    {
-      "Name": "GameplayAbilities",
-      "Enabled": true
-    },
-    {
-      "Name": "ModelingToolsEditorMode",
-      "Enabled": true,
-      "TargetAllowList": [
-        "Editor"
-      ]
-    }
-  ]
+	"Plugins": [
+		{
+			"Name": "GameplayAbilities",
+			"Enabled": true
+		},
+		{
+			"Name": "ModelingToolsEditorMode",
+			"Enabled": true,
+			"TargetAllowList": [
+				"Editor"
+			]
+		}
+	]
 }