fix(): pin @actions/core ^1.8.1

| datasource | package       | from  | to    |
| ---------- | ------------- | ----- | ----- |
| npm        | @actions/core | 1.2.7 | 1.8.1 |

package.json

@@ -23,7 +23,7 @@
   "author": "MindDoc Health GmbH",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.2.7",
+    "@actions/core": "^1.8.1",
     "@actions/github": "^4.0.0",
     "@octokit/core": "^3.4.0",
     "@octokit/plugin-paginate-rest": "^2.13.3",

yarn.lock

@@ -5,10 +5,12 @@ __metadata:
   version: 4
   cacheKey: 7
 
-"@actions/core@npm:^1.2.7":
-  version: 1.2.7
-  resolution: "@actions/core@npm:1.2.7"
-  checksum: ea8aa7e54523f26e51b056e2b5b830d24a26a972e5aa80cf4c9ea2ad8785e4f67cf316a0514cec0a71bd6d1267c415b85143774a13690988532071b395bcb4a3
+"@actions/core@npm:^1.8.1":
+  version: 1.8.1
+  resolution: "@actions/core@npm:1.8.1"
+  dependencies:
+    "@actions/http-client": ^2.0.0
+  checksum: 945b0cc9cb86b2b6aa7b5eb928cd30b05078c9e854337bfe0bd978f9ab3de06f9282df1f4f4f818b50f9591c702f0fccb008f4a65da72c7e4814497ef26f2710
   languageName: node
   linkType: hard
 
@@ -33,6 +35,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@actions/http-client@npm:^2.0.0":
+  version: 2.0.0
+  resolution: "@actions/http-client@npm:2.0.0"
+  checksum: 1e5d3b722ed85e2f37d9fa12191d5c8e3f3de997d7318f6fb5daf9b0618848f30215ff010a3b4f19d3498ab78236432b9369787982bae58d8529f1fad0fbbdd7
+  languageName: node
+  linkType: hard
+
 "@arcanis/slice-ansi@npm:^1.0.2":
   version: 1.0.2
   resolution: "@arcanis/slice-ansi@npm:1.0.2"
@@ -6109,7 +6118,7 @@ fsevents@^2.3.2:
   version: 0.0.0-use.local
   resolution: "mou-release-action@workspace:."
   dependencies:
-    "@actions/core": ^1.2.7
+    "@actions/core": ^1.8.1
     "@actions/github": ^4.0.0
     "@octokit/core": ^3.4.0
     "@octokit/plugin-paginate-rest": ^2.13.3