[tekton] add image-digest to sast-unicode-check

This commits reacts to task-sast-unicode-check-oci-ta migration
from 0.2 to 0.3 and adds the now required image-digest to
the sast-unicode-check task

Author: jrvaldes

.tekton/windows-machine-config-operator-bundle-release-4-20-pull-request.yaml

@@ -373,6 +373,8 @@ spec:
         - 'false'
     - name: sast-unicode-check
       params:
+      - name: image-digest
+        value: $(tasks.build-container.results.IMAGE_DIGEST)
       - name: image-url
         value: $(tasks.build-container.results.IMAGE_URL)
       - name: SOURCE_ARTIFACT

.tekton/windows-machine-config-operator-bundle-release-4-20-push.yaml

@@ -370,6 +370,8 @@ spec:
         - 'false'
     - name: sast-unicode-check
       params:
+      - name: image-digest
+        value: $(tasks.build-container.results.IMAGE_DIGEST)
       - name: image-url
         value: $(tasks.build-container.results.IMAGE_URL)
       - name: SOURCE_ARTIFACT

.tekton/windows-machine-config-operator-release-4-20-pull-request.yaml

@@ -369,6 +369,8 @@ spec:
         - 'false'
     - name: sast-unicode-check
       params:
+      - name: image-digest
+        value: $(tasks.build-container.results.IMAGE_DIGEST)
       - name: image-url
         value: $(tasks.build-container.results.IMAGE_URL)
       - name: SOURCE_ARTIFACT

.tekton/windows-machine-config-operator-release-4-20-push.yaml

@@ -366,6 +366,8 @@ spec:
         - 'false'
     - name: sast-unicode-check
       params:
+      - name: image-digest
+        value: $(tasks.build-container.results.IMAGE_DIGEST)
       - name: image-url
         value: $(tasks.build-container.results.IMAGE_URL)
       - name: SOURCE_ARTIFACT