Tekton: yq Task gives safelyRenameFile [ERRO] Failed copying from /tmp/temp & [ERRO] open /workspace/source permission denied error

Question

We have a Tekton pipeline and want to replace the image tags contents of our deployment.yml:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: microservice-api-spring-boot
spec:
  replicas: 3
  revisionHistoryLimit: 3
  selector:
    matchLabels:
      app: microservice-api-spring-boot
  template:
    metadata:
      labels:
        app: microservice-api-spring-boot
    spec:
      containers:
        - image: registry.gitlab.com/jonashackt/microservice-api-spring-boot@sha256:5d8a03755d3c45a3d79d32ab22987ef571a65517d0edbcb8e828a4e6952f9bcd
          name: microservice-api-spring-boot
          ports:
            - containerPort: 8098
      imagePullSecrets:
        - name: gitlab-container-registry

Our Tekton pipeline uses the yq Task from Tekton Hub to replace the .spec.template.spec.containers[0].image with the "$(params.IMAGE):$(params.SOURCE_REVISION)" name like this:

- name: substitute-config-image-name
  taskRef:
    name: yq
  runAfter:
    - fetch-config-repository
  workspaces:
    - name: source
      workspace: config-workspace
  params:
    - name: files
      value:
      - "./deployment/deployment.yml"
    - name: expression
      value: .spec.template.spec.containers[0].image = \"$(params.IMAGE)\":\"$(params.SOURCE_REVISION)\"

Sadly the yq Task doesn't seem to work, it produces a green Step completed successfully, but shows the following errors:

16:50:43 safelyRenameFile [ERRO] Failed copying from /tmp/temp3555913516 to /workspace/source/deployment/deployment.yml
16:50:43 safelyRenameFile [ERRO] open /workspace/source/deployment/deployment.yml: permission denied

Here's also a screenshot from our Tekton Dashboard:

Any idea on how to solve the error?