Fix bug in nightly osv-scanner CI job

When we patched the CI job to allow checking out git submodules, I
accidentally copy-pasted the wrong workflow yaml file. This made the
nightly scheduled scan use the PR workflow. This workflow does not work
in this setting, and it always just reported green status

Moving back to consuming the workflow from google instead of our fork
again, since the PR with the needed changes have been merged upstream

Author: faern

.github/workflows/osv-scanner-pr.yml

@@ -17,6 +17,6 @@ jobs:
       actions: read
 
     # yamllint disable rule:line-length
-    uses: "mullvad/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@ab8175fc65a74d8c0308f623b1c617a39bdc34fe"  # v1.9.0
+    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@ab8175fc65a74d8c0308f623b1c617a39bdc34fe"  # v1.9.2 + submodule patch
     with:
       checkout-submodules: true

.github/workflows/osv-scanner-scheduled.yml

@@ -18,6 +18,6 @@ jobs:
       actions: read
 
     # yamllint disable rule:line-length
-    uses: "mullvad/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@ab8175fc65a74d8c0308f623b1c617a39bdc34fe"  # v1.9.0
+    uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@ab8175fc65a74d8c0308f623b1c617a39bdc34fe"  # v1.9.2 + submodule patch
     with:
       checkout-submodules: true