chore(deps): upgrade jenkins-x-plugins/jx-pipeline to version 0.7.8

from: https://github.com/jenkins-x-plugins/jx-pipeline.git

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# jenkins-x-plugins/jx-pipeline

## Changes in version 0.7.8

### Bug Fixes

* add release target (Mårten Svantesson)
* yum in centos 7 broken (Mårten Svantesson)
* make codecov step run (Mårten Svantesson)

### Chores

* ran make docs (Mårten Svantesson)
* upgrade go to 1.22 (Mårten Svantesson)

pkg/plugins/versions.go

@@ -28,7 +28,7 @@ const (
 	OctantJXVersion = "0.0.44"
 
 	// PipelineVersion the version of the jx pipeline plugin
-	PipelineVersion = "0.7.6"
+	PipelineVersion = "0.7.8"
 
 	// PreviewVersion the version of the jx preview plugin
 	PreviewVersion = "0.5.1"