GHA: Simplify script reference

This workflow was originally crafted to be (somehow) reused with
different scripts.  That never happened and the extra indirection is
confusing and hard to maintain.  Remove it.

Signed-off-by: Chris Evich <cevich@redhat.com>

.github/workflows/check_cirrus_cron.yml

@@ -38,7 +38,7 @@ jobs:
 
             - name: Get failed cron names and Build IDs
               id: cron
-              run: './.github/actions/${{ github.workflow }}/${{ github.job }}.sh'
+              run: './.github/actions/check_cirrus_cron/cron_failures.sh'
 
             - if: steps.cron.outputs.failures > 0
               shell: bash