Remove 'if' condition from check-links job

Remove conditional check for check-links job.

Author: egorikftp

.github/workflows/validation.yml

@@ -10,7 +10,6 @@ concurrency:
 
 jobs:
   check-links:
-    if: false # https://github.com/UmbrellaDocs/action-linkspector/issues/62
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6