Fix step names in the saveAsTypedBigQuery transform

[inejc]

Fixes #1061.

[andrewsmartin]

Thanks!

[codecov-io]

Codecov Report

Merging #1127 into master will decrease coverage by 9.75%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #1127      +/-   ##
=========================================
- Coverage   81.66%   71.9%   -9.76%     
=========================================
  Files         119     119              
  Lines        4019    3983      -36     
  Branches      403     354      -49     
=========================================
- Hits         3282    2864     -418     
- Misses        737    1119     +382

Impacted Files	Coverage Δ
...in/scala/com/spotify/scio/values/SCollection.scala	75.09% <0%> (-3.25%)	⬇️
...scala/com/spotify/scio/bigquery/MockBigQuery.scala	0% <0%> (-95.13%)	⬇️
...la/com/spotify/scio/bigquery/dynamic/package.scala	0% <0%> (-94.45%)	⬇️
...cio/bigquery/dynamic/DynamicDestinationsUtil.scala	0% <0%> (-80%)	⬇️
...n/scala/com/spotify/scio/bigtable/TableAdmin.scala	0% <0%> (-80%)	⬇️
...ala/com/spotify/scio/bigquery/BigQueryClient.scala	14.11% <0%> (-67.57%)	⬇️
.../spotify/scio/bigquery/BigQueryPartitionUtil.scala	45% <0%> (-55%)	⬇️
...ala/com/spotify/scio/avro/types/TypeProvider.scala	45.31% <0%> (-42.19%)	⬇️
...n/scala/com/spotify/scio/avro/types/AvroType.scala	55.55% <0%> (-33.34%)	⬇️
...com/spotify/scio/bigquery/types/BigQueryType.scala	68.75% <0%> (-25%)	⬇️
... and 11 more

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