Issue289 (redhat-developer-demos#290)

* previous changes were rephrased

* some changes were rephrased

Co-authored-by: ammbra <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>

more namespace references were removed (redhat-developer-demos#283)

* removed namespace from kubectl and kn commands

* more namespace references removed

* Updated the traffic distribution to use the new rules

Co-authored-by: ammbra <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>

update version

Merge pull request redhat-developer-demos#268 from redhat-developer-d…

…emos/release-v1.13.4

chore: release 1.13.4

Merge pull request redhat-developer-demos#267 from redhat-developer-d…

…emos/release-v1.13.3

chore: release 1.13.3

Merge pull request redhat-developer-demos#266 from redhat-developer-d…

…emos/release-v1.13.2

chore: release 1.13.2

Merge pull request redhat-developer-demos#265 from redhat-developer-d…

…emos/release-v1.13.1

chore: release 1.13.1

chore: release 1.13.0 (redhat-developer-demos#259)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

fix: Updated to Knative v0.19

update the contribution guide