Add .lycheeignore file with linkedin to stop error on workflow Linkcheck (#2868)

Add a .lycheeignore file with LinkedIn to stop the error in the workflow
Link Checker due to response 999, and update to the new version
lycheeverse/[email protected].

Author: Eyezuhk

.github/workflows/broken-links.yml

@@ -45,7 +45,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Link Checker 🔗
-        uses: lycheeverse/lychee-action@v1.9.0
+        uses: lycheeverse/lychee-action@v2.1.0
         with:
           fail: true
           # removed md files that include liquid tags

.lycheeignore

@@ -0,0 +1,2 @@
+linkedin.com
+reddit.com