reverted the Vale min alert to error and added a job to test a html link cehcker

Author: abhatt-rh

.github/workflows/htmltest.yml

@@ -0,0 +1,13 @@
+name: Check internal links
+on: push
+jobs:
+  check_html_links_job:
+    name: A job to test only internal links
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: check-html-links-action step
+        id: check-links
+        uses: modernweb-dev/check-html-links-action@v1
+        with:
+         doc-folder: public/

.github/workflows/internal-links-action.yml

@@ -16,5 +16,5 @@ jobs:
             This is an automated message:
 
             You can preview this docs PR at http://${{ github.event.number }}.docs-pr.validatedpatterns.io
-            Note that they get generated every five minutes, so please wait a bit.
+            Note that the preview gets generated every five minutes, so please wait a bit.
           repo-token: ${{ secrets.DOCS_PR_TOKEN }}

.github/workflows/preview-message.yml

@@ -10,7 +10,7 @@ jobs:
       - uses: errata-ai/vale-action@reviewdog
         with:
           filter_mode: added
-          vale_flags: "--no-exit --minAlertLevel=suggestion --glob=*.adoc"
+          vale_flags: "--no-exit --minAlertLevel=error --glob=*.adoc"
           reporter: github-pr-review
           fail_on_error: false
         env:

.github/workflows/vale-action.yml

@@ -16,3 +16,5 @@ Gemfile.lock
 .idea
 .vale/styles/AsciiDoc
 .vale/styles/RedHat
+.htmltest.yml
+.github/workflows/htmltest.yml