[release-v1.17] Update quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2 Docker digest to 57d9107 (#867)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan |
tekton-bundle | digest | `bff03fe` -> `57d9107` |

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Signed-off-by: red-hat-konflux-kflux-prd-rh02 <190377777+red-hat-konflux-kflux-prd-rh02[bot]@users.noreply.github.com>
Co-authored-by: red-hat-konflux-kflux-prd-rh02[bot] <190377777+red-hat-konflux-kflux-prd-rh02[bot]@users.noreply.github.com>

Author: red-hat-konflux-kflux-prd-rh02[bot]

.tekton/docker-build.yaml

@@ -541,7 +541,7 @@ spec:
       - name: name
         value: rpms-signature-scan
       - name: bundle
-        value: quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2@sha256:bff03feaaeb54b7e185606abf80a187290b2b749364f1c331d79b45af35651b5
+        value: quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2@sha256:57d9107fe4708b503f494cf4362fef770623fdb300641811f23a975cd597b024
       - name: kind
         value: task
       resolver: bundles