chore(deps): update longhornio/longhorn-share-manager docker tag to v1.8.0

kubernetes/longhorn/helm/values.yaml

@@ -15,7 +15,7 @@ image:
       tag: "v1.8.0"
     shareManager:
       repository: "longhornio/longhorn-share-manager"
-      tag: "v1.7.2"
+      tag: "v1.8.0"
     backingImageManager:
       repository: "longhornio/backing-image-manager"
       tag: "v1.8.0"