Add addional patcher to make it possible to set matchlabels

docs/api-reference/patchers.md

@@ -53,6 +53,27 @@ Patchers can be seen as functions which take a value as input and modify a Kuber
   * **resource**: "uc1-kstreams-deployment.yaml"
   * **example value**: "random-scheduler"
 
+* **LabelPatcher**: Changes the label of a Kubernetes Deployment or StatefulSet. The patched field is: `metadata.labels`
+  * **type**: "LabelPatcher"
+  * **resource**: "uc1-kstreams-deployment.yaml"
+  * **properties**:
+    * variableName: "app"
+  * **example value**: "theodolite-sut"
+
+* **MatchLabelPatcher**: Changes the match labels of a Kubernetes Deployment or StatefulSet. The patched field is: `spec.selector.matchLabels`
+  * **type**: "MatchLabelPatcher"
+  * **resource**: "uc1-kstreams-deployment.yaml"
+  * **properties**:
+    * variableName: "app"
+  * **example value**: "theodolite-sut"
+
+* **TemplateLabelPatcher**: Changes the template labels of a Kubernetes Deployment or StatefulSet. The patched field is: `spec.template.metadata.labels`
+  * **type**: "MatchLabelPatcher"
+  * **resource**: "uc1-kstreams-deployment.yaml"
+  * **properties**:
+    * variableName: "app"
+  * **example value**: "theodolite-sut"
+
 * **ImagePatcher**: Changes the image of a Kubernetes resource. **Currently not fully implemented.**
   * **type**: "ImagePatcher"
   * **resource**: "uc1-kstreams-deployment.yaml"