fix(deps): pin @octokit/core peerDependency to v5 (#720)

Pin @octokit/core peerDependency to v5

Author: DanCurryy

package.json

@@ -52,7 +52,7 @@
     "typescript": "^5.0.0"
   },
   "peerDependencies": {
-    "@octokit/core": ">=5"
+    "@octokit/core": "5"
   },
   "jest": {
     "transform": {