Update unified workflow example to point to v1.8.1 reusable workflows

Author: another-rex

.github/workflows/osv-scanner-unified-workflow.yml

@@ -35,7 +35,7 @@ permissions:
 jobs:
   scan-scheduled:
     if: ${{ github.event_name == 'push' || github.event_name == 'schedule' }}
-    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@ba0b4d196d231340e0ae94ae00933c8be0984192" # v1.7.4
+    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@6d2b388dfd698241547c91007c380a52e5155ff7" # v1.8.1
     with:
       # Example of specifying custom arguments
       scan-args: |-
@@ -44,7 +44,7 @@ jobs:
         ./
   scan-pr:
     if: ${{ github.event_name == 'pull_request' || github.event_name == 'merge_group' }}
-    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@ba0b4d196d231340e0ae94ae00933c8be0984192" # v1.7.4
+    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@6d2b388dfd698241547c91007c380a52e5155ff7" # v1.8.1
     with:
       # Example of specifying custom arguments
       scan-args: |-