Bump actions version to 3.4

Author: Aflynn50

.github/workflows/test.yaml

@@ -83,7 +83,7 @@ jobs:
         uses: charmed-kubernetes/actions-operator@main
         with:
           provider: lxd
-          juju-channel: 3.3/stable
+          juju-channel: 3.4/stable
       # 2023-01-11 Commented until we discover a
       # clear approach for this.
       # - name: Set proxy in controller

.github/workflows/test_candidate.yaml

@@ -54,7 +54,7 @@ jobs:
         uses: charmed-kubernetes/actions-operator@main
         with:
           provider: lxd
-          juju-channel: 3.3/candidate
+          juju-channel: 3.4/candidate
       - name: Setup Python
         if: ${{ env.next-test != 'NA' }}
         uses: actions/setup-python@v4

.github/workflows/test_edge.yaml

@@ -54,7 +54,7 @@ jobs:
         uses: charmed-kubernetes/actions-operator@main
         with:
           provider: lxd
-          juju-channel: 3.3/edge
+          juju-channel: 3.4/edge
       - name: Setup Python
         if: ${{ env.next-test != 'NA' }}
         uses: actions/setup-python@v4