Backfill Kopernicus 1.8.1-24 and fix 1.8.1-23 download (#2250)

Version 1.8.1-24 got uploaded shortly before 1.9.1-24 and thus has been missed;
Version 1.8.1-23 has been deleted and recreated with a slightly different tag name.

Kopernicus/Kopernicus-2-release-1.8.1-23.ckan

@@ -56,7 +56,7 @@
             "install_to": "GameData"
         }
     ],
-    "download": "https://github.com/Kopernicus/Kopernicus/releases/download/1.8.1-23/Kopernicus-1.8.1-23.zip",
+    "download": "https://github.com/Kopernicus/Kopernicus/releases/download/release-1.8.1-23/Kopernicus-1.8.1-23.zip",
     "download_size": 389990,
     "download_hash": {
         "sha1": "447C6889A6450BD4D55DBD1F570DFBC7BC6206CB",

Kopernicus/Kopernicus-2-release-1.8.1-24.ckan

@@ -0,0 +1,68 @@
+{
+    "spec_version": "v1.4",
+    "identifier": "Kopernicus",
+    "name": "Kopernicus Planetary System Modifier",
+    "abstract": "Allows users to replace the planetary system used by the game.",
+    "author": [
+        "BryceSchroeder",
+        "Teknoman117",
+        "Thomas P.",
+        "NathanKell",
+        "KillAshley",
+        "Gravitasi",
+        "KCreator",
+        "Sigma88",
+        "R-T-B",
+        "prestja"
+    ],
+    "version": "2:release-1.8.1-24",
+    "ksp_version": "1.8.1",
+    "license": "LGPL-3.0",
+    "release_status": "development",
+    "resources": {
+        "homepage": "https://forum.kerbalspaceprogram.com/index.php?/topic/194936-*",
+        "repository": "https://github.com/Kopernicus/Kopernicus",
+        "bugtracker": "https://github.com/Kopernicus/Kopernicus/issues",
+        "remote-avc": "https://raw.githubusercontent.com/Kopernicus/Kopernicus/master/build/KSP181/GameData/Kopernicus/Plugins/Kopernicus.version"
+    },
+    "tags": [
+        "plugin",
+        "library"
+    ],
+    "localizations": [
+        "en-us",
+        "it-it",
+        "ru",
+        "zh-cn"
+    ],
+    "depends": [
+        {
+            "name": "ModuleManager",
+            "min_version": "2.8.0"
+        },
+        {
+            "name": "ModularFlightIntegrator",
+            "min_version": "1.2.4.0"
+        }
+    ],
+    "suggests": [
+        {
+            "name": "KittopiaTech"
+        }
+    ],
+    "install": [
+        {
+            "find": "Kopernicus",
+            "install_to": "GameData"
+        }
+    ],
+    "download": "https://github.com/Kopernicus/Kopernicus/releases/download/release-1.8.1-24/Kopernicus-1.8.1-24.zip",
+    "download_size": 384828,
+    "download_hash": {
+        "sha1": "81A4F188088704B95E40F3866E754F0371136F02",
+        "sha256": "E48B50F7B5173BD0EAD3677F3C192B98B54163FCB3C926267FFDE86EF1DF434A"
+    },
+    "download_content_type": "application/zip",
+    "release_date": "2021-01-29T20:27:02Z",
+    "x_generated_by": "netkan"
+}