Fix workflow issue caused by backwards incompatible component

Thanks to @probonopd for suggesting this fix.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

.github/workflows/linux-trusty-5.12.yml

@@ -35,7 +35,7 @@ jobs:
 
     - name: PR artifacts
       if: github.event_name == 'pull_request'
-      uses: actions/upload-artifact@master
+      uses: actions/upload-artifact@v3
       with:
         name: Linux-artifacts
         path: Linux-artifacts