Add lychee ignore file

Author: dhruv-tyagi-broadcom

.github/workflows/links.yml

@@ -42,10 +42,11 @@ jobs:
           path: .lycheecache
           key: ${{ steps.restore-cache.outputs.cache-primary-key }}
 
-      - name: Create Issue From File
+      - name: Create or Update Issue From File
         if: steps.lychee.outputs.exit_code != 0
         uses: peter-evans/create-issue-from-file@v5
         with:
           title: Link Checker Report
           content-filepath: ./lychee/out.md
           labels: report, automated issue
+          update-existing: true

.lycheeignore

@@ -0,0 +1,6 @@
+# Internal Holodeck nested environment FQDNs (not resolvable externally)
+.*\.site-a\.vcf\.lab
+.*\.site-b\.vcf\.lab
+
+# Broadcom community site frequently returns 500 to automated requests
+https://community\.broadcom\.com/.*