[chore] Pin markdown-link-check version to 3.12.2 (open-telemetry#36231)

## Description

Follow-up of
open-telemetry#36223

Signed-off-by: odubajDT <ondrej.dubaj@dynatrace.com>

.github/workflows/check-links.yaml

@@ -36,7 +36,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install markdown-link-check
-        run: npm install -g markdown-link-check
+        run: npm install -g markdown-link-check@3.12.2
 
       - name: Run markdown-link-check
         run: |