Revert "Bump pipeline-model-definition-plugin.version in /bom-weekly (j…

…enkinsci#3100)"

Breaks the ssh-agent plugin tests.

This reverts commit f42902f.

bom-weekly/pom.xml

@@ -24,7 +24,7 @@
     <mina-sshd-api.version>2.12.1-101.v85b_e08b_780dd</mina-sshd-api.version>
     <okhttp-api-plugin.version>4.11.0-172.vda_da_1feeb_c6e</okhttp-api-plugin.version>
     <pipeline-maven-plugin.version>1396.veb_f07b_2fc1d8</pipeline-maven-plugin.version>
-    <pipeline-model-definition-plugin.version>2.2188.v26e255fd2984</pipeline-model-definition-plugin.version>
+    <pipeline-model-definition-plugin.version>2.2184.v0b_358b_953e69</pipeline-model-definition-plugin.version>
     <pipeline-stage-view-plugin.version>2.34</pipeline-stage-view-plugin.version>
     <plugin-util-api.version>4.1.0</plugin-util-api.version>
     <scm-api-plugin.version>689.v237b_6d3a_ef7f</scm-api-plugin.version>