Limit the "Update Components Graph" github action (kubevirt#1941)

the Update Components Graph github action works on any fork with a cron
expression. Then it fails every day and sends error email every day to
all the fork owners.

This PR limits the action to work only in the
kubevirt/hyperconverged-cluster-operator github repository.

Signed-off-by: Nahshon Unna-Tsameret <nunnatsa@redhat.com>

.github/workflows/graphs-updater.yml

@@ -6,6 +6,7 @@ on:
 jobs:
   build:
     name: Update Components Graph
+    if: (github.repository == 'kubevirt/hyperconverged-cluster-operator')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout this repository