message: Change Link to use backstage/core
diff: */
  import React from 'react';
  -import { Box, Typography, Link } from '@material-ui/core';
  -import { CodeSnippet } from '@backstage/core';
  +import { Box, Typography } from '@material-ui/core';
  +import { CodeSnippet, Link } from '@backstage/core';
  import { AlertInstructionsLayout } from '../AlertInstructionsLayout';
  export const LabelDataflowInstructionsPage = () => {
  @@ -32,7 +32,7 @@ export const LabelDataflowInstructionsPage = () => {
  <Typography paragraph>
  In Cloud Dataflow, labels can be added to a job either programmatically
  or via the command-line when launching a job. Note that GCP has{' '}
  - <Link href="https://cloud.google.com/compute/docs/labeling-resources#restrictions">
  + <Link to="https://cloud.google.com/compute/docs/labeling-resources#restrictions">
  restrictions
  </Link>{' '}
  on the length and characters that can be used in labels.
  @@ -46,7 +46,7 @@ export const LabelDataflowInstructionsPage = () => {
  <Typography variant="h3">DataflowPipelineOptions</Typography>
  <Typography paragraph>
  Dataflow jobs using Beam's{' '}
  - <Link href="https://beam.apache.org/releases/javadoc/2.3.0/org/apache/beam/runners/dataflow/options/DataflowPipelineOptions.html">
  + <Link to="https://beam.apache.org/releases/javadoc/2.3.0/org/apache/beam/runners/dataflow/options/DataflowPipelineOptions.html">
  DataflowPipelineOptions
  </Link>{' '}
  directly can use the <b>setLabels</b> function to add one or more
  @@ -79,11 +79,11 @@ sc.optionsAs[DataflowPipelineOptions].setLabels(Map("job-id" -> "my-dataflow-job
  </Typography>
  <Typography paragraph>
  For more information on specifying options, see the{' '}
  - <Link href="https://cloud.google.com/dataflow/docs/guides/specifying-exec-params">
  + <Link to="https://cloud.google.com/dataflow/docs/guides/specifying-exec-params">
  Dataflow documentation
  </Link>{' '}
  or{' '}
  - <Link href="https://spotify.github.io/scio/api/com/spotify/scio/ScioContext.html">
  + <Link to="https://spotify.github.io/scio/api/com/spotify/scio/ScioContext.html">
  Scio Scaladoc
  </Link>
  .
  