Hotfix GithubService areUsersAssignable bug (#926)

There is a bug with the retrieval of the assignees where not all 
assignees are retrieved, causing unwanted errors to be thrown. 

Let's hotfix this temporarily be removing the errors to be thrown 
and do a proper fix in the next official release.

src/app/core/services/github.service.ts

@@ -274,7 +274,7 @@ export class GithubService {
       map((assignables: string[]) =>
         assignees.forEach((assignee) => {
           if (!assignables.includes(assignee)) {
-            throw new Error(`Cannot assign ${assignee} to the issue. Please check if ${assignee} is authorized.`);
+            // throw new Error(`Cannot assign ${assignee} to the issue. Please check if ${assignee} is authorized.`);
           }
         })
       )