Pin Lychee before filename parsing regression

Lychee Action's checkbox guard mistakes the --models-- segment in an existing publication URL for a --mode option and exits before checking links. Pin the action to the immediate parent of that regression so both link checks can process the active page list.

Author: zayenz

.github/workflows/pages.yml

@@ -61,7 +61,7 @@ jobs:
           uploadArtifacts: true
 
       - name: Check internal links
-        uses: lycheeverse/lychee-action@v2
+        uses: lycheeverse/lychee-action@f613c4a64e50d792e0b31ec34bbcbba12263c6a6
         with:
           args: >-
             --verbose --no-progress --offline --exclude-mail
@@ -71,7 +71,7 @@ jobs:
 
       - name: Check external links
         continue-on-error: true
-        uses: lycheeverse/lychee-action@v2
+        uses: lycheeverse/lychee-action@f613c4a64e50d792e0b31ec34bbcbba12263c6a6
         with:
           args: >-
             --verbose --no-progress --exclude-mail