Stop updating upstream 1.9 branch (#144)

* Stop updating upstream 1.9 branch

* Stop labelling need to port to 1.9

Author: nickrobinson251

.github/labeler.yml

@@ -1,4 +1,3 @@
 # See https://github.com/actions/labeler
 port-to-master: '**'
 port-to-v1.10: '**'
-port-to-v1.9: '**'

.github/workflows/update-upstream-branches.yml

@@ -13,7 +13,6 @@ jobs:
         branch:
           - "master"
           - "backports-release-1.10"
-          - "backports-release-1.9"
     steps:
       - name: Checkout RAI/julia
         uses: actions/checkout@v3