Minor correction in SDF Python examples

[jbrr]

While trying to wrap my head around what exactly an SDF is, I noticed that the package name containing RestrictionProvider was incorrect in a couple places.

@aaltay
@charlesccychen

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ValidatesRunner compliance status (on master branch)

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---					---
Java
Python	---					---
XLang						---

Examples testing status on various runners

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---	---	---	---	---	---	---
Java	---		---	---	---	---	---
Python	---	---	---	---	---	---	---
XLang	---	---	---	---	---	---	---

Post-Commit SDK/Transform Integration Tests Status (on master branch)

Go	Java	Python

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website	Whitespace	Typescript
Non-portable
Portable	---			---	---	---

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GitHub Actions Tests Status (on master branch)

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[codecov]

Codecov Report

Merging #15259 (3974b13) into master (dce846b) will increase coverage by 0.24%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #15259      +/-   ##
==========================================
+ Coverage   83.84%   84.09%   +0.24%     
==========================================
  Files         441      441              
  Lines       59724    61552    +1828     
==========================================
+ Hits        50077    51761    +1684     
- Misses       9647     9791     +144     

Impacted Files	Coverage Δ
...s/python/apache_beam/examples/snippets/snippets.py	76.70% <0.00%> (ø)
...hon/apache_beam/runners/direct/test_stream_impl.py	94.02% <0.00%> (-2.24%)	⬇️
sdks/python/apache_beam/io/gcp/bigquery_tools.py	87.41% <0.00%> (-0.02%)	⬇️
sdks/python/apache_beam/io/filebasedsource.py	98.73% <0.00%> (-0.02%)	⬇️
...ython/apache_beam/examples/kafkataxi/kafka_taxi.py	0.00% <0.00%> (ø)
sdks/python/apache_beam/transforms/ptransform.py	93.63% <0.00%> (+0.08%)	⬆️
...s/python/apache_beam/io/gcp/bigquery_file_loads.py	87.58% <0.00%> (+0.08%)	⬆️
sdks/python/apache_beam/io/textio.py	97.32% <0.00%> (+0.24%)	⬆️
...apache_beam/runners/dataflow/internal/apiclient.py	75.31% <0.00%> (+0.64%)	⬆️
sdks/python/apache_beam/io/fileio.py	96.64% <0.00%> (+0.74%)	⬆️
... and 6 more

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[lukecwik]

Run Python PreCommit

[lukecwik]

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Run Python_PVR_Flink PreCommit

[lukecwik]

13:41:13 Running pylint...
13:42:20 ************* Module apache_beam.examples.snippets.snippets
13:42:20 apache_beam/examples/snippets/snippets.py:1650:0: C0301: Line too long (81/80) (line-too-long)
13:42:20 apache_beam/examples/snippets/snippets.py:1683:0: C0301: Line too long (81/80) (line-too-long)

[lukecwik]

Run Python PreCommit

[lukecwik]

R: @lukecwik

[lukecwik]

@pabloem I'm waiting till BEAM-12699 so I can the test can pass.

[lukecwik]

Run Python PreCommit

[lukecwik]

Run Python PreCommit

[lukecwik]

Run Python PreCommit

[lukecwik]

Run Python PreCommit

[lukecwik]

Ignoring codecov/patch result