fix(forgejo): remove nodeSelector now that Longhorn runs on all nodes

With Longhorn now running on all 3 control-plane nodes (commit be7881d),
Forgejo pods no longer need to be pinned to talos-cp-1. The gitea-shared-storage
PVC can attach on any node, and the scheduler will properly co-locate pod + volume
via WaitForFirstConsumer + 3-replica Longhorn volumes.

Removes the kubernetes.io/hostname: talos-cp-1 nodeSelector added in commit
dde4b60 (which was a workaround for single-node storage).

k8s/argocd/bootstrap/forgejo.yaml

@@ -117,8 +117,6 @@ spec:
           limits:
             cpu: "1"
             memory: 1Gi
-        nodeSelector:
-          kubernetes.io/hostname: talos-cp-1
         tolerations:
           - key: node-role.kubernetes.io/control-plane
             operator: Exists