Disable ppc64le runner in PR workflow

Comment out ppc64le runner configuration in PR workflow.

Signed-off-by: Jorge Turrado Ferrero <Jorge_turrado@hotmail.es>

Author: JorTurFer

.github/workflows/pr.yml

@@ -45,8 +45,8 @@ jobs:
             name: amd64
           - runner: s390x
             name: s390x
-          - runner: ppc64le
-            name: ppc64le
+          # - runner: ppc64le
+          #   name: ppc64le
     steps:
       - uses: actions/checkout@v3