Update .github/workflows/reusable-link-check.yml

Co-authored-by: Trask Stalnaker <[email protected]>

Author: zeitlinger

.github/workflows/reusable-link-check.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
-          fetch-depth: 0 # needed for merge-base below
+          fetch-depth: 0 # needed for merge-base used in lint:links-in-modified-files
 
       - uses: jdx/mise-action@e3d7b8d67a7958d1207f6ed871e83b1ea780e7b0 # v3.3.1