Add Jonas to the org

Jonas has recently become a regularly contributor. He started with adding a minor [_missing_ `omitempty`](tektoncd/pipeline#2301) and then [proposed some ideas](tektoncd/pipeline#1986 (comment)) around workspaces and PersistentVolumeClaim creation and continued to [elaborate around those ideas](tektoncd/pipeline#1986 (comment)). A sunny day a few days later, he also submitted an [extensive implementation for volumeClaimTemplate](tektoncd/pipeline#2326), corresponding to the idea discussions.

A few days later submitted a [small refactoring PR](tektoncd/pipeline#2392), and he also listened to community members that [proposed changes](tektoncd/pipeline#2450) to his implementation about volumeClaimTemplates and did an [implementation for that proposal](tektoncd/pipeline#2453).

A rainy day, he also wrote [technical documentation about PVCs](tektoncd/pipeline#2521) including adding an example that caused _flaky_ integration tests for the whole community during multiple days. When he understood his mistake, he submitted a [removal of the example](tektoncd/pipeline#2546) that caused flaky tests.

He has also put his toe into Tekton Catalog and [contributed to the buildah task](tektoncd/pipeline#2546).

This has followed, mostly with more PRs to the Pipeline project:

- tektoncd/pipeline#2460
- tektoncd/pipeline#2491
- tektoncd/pipeline#2502
- tektoncd/pipeline#2506
- tektoncd/pipeline#2632
- tektoncd/pipeline#2633
- tektoncd/pipeline#2634
- tektoncd/pipeline#2636
- tektoncd/pipeline#2601
- tektoncd/pipeline#2630

Jonas is excited about the great community around Tekton and the project! He now would like to join the org.

org/org.yaml

@@ -50,6 +50,7 @@ orgs:
     - jerop
     - jessm12
     - jkutner
+    - jlpettersson
     - joseblas
     - jromero
     - khrm