docs/user/tasks-*by-number-and-component.svg: Update to 4.20

Using a similar process to cde8d50 (docs/user/reconciliation:
Document release-image application, 2019-06-10, #201) and 4353698
(docs/user/tasks-*by-number-and-component.svg: Update to 4.13,
2023-07-25, #949), but for 4.20.0-ec.5.  The SVGs were generated with
the new --granularity flag set to 'manifest', to make it easier for
cluster operator maintainers to understand how their manifests are
collected into task nodes:

  $ go build ./hack/cluster-version-util
  $ mkdir /tmp/release
  $ oc image extract quay.io/openshift-release-dev/ocp-release:4.20.0-ec.5-x86_64[-1] --path /:/tmp/release
  $ mkdir /tmp/release/manifests
  $ ./cluster-version-util task-graph --granularity manifest /tmp/release | dot -Tsvg >docs/user/tasks-by-number-and-component.svg
  $ ./cluster-version-util task-graph --granularity manifest --parallel flatten-by-number-and-component /tmp/release | dot -Tsvg >docs/user/tasks-flatten-by-number-and-component.svg

using:

  $ go version
  go version go1.23.6 linux/amd64
  $ dot -V
  dot - graphviz version 2.43.0 (0)

Author: wking