[Doc] fix LSTM example import in rnn.LSTMModule

[arvindcr4]

This PR fixes a minor import issue in the LSTMModule docstring example.

• Add to the import alongside so the snippet runs as-is without raising a .

Documentation-only change.

Closes #3119

[pytorch-bot]

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❌ 6 New Failures, 2 Cancelled Jobs, 16 Unrelated Failures

As of commit bb07f7c with merge base 2f65671 ():

NEW FAILURES - The following jobs have failed:

• Continuous Benchmark (PR) / CPU Pytest benchmark (gh)
  Process completed with exit code 2.
• Generate documentation / build-docs (3.9, 12.8) / linux-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Lint / c-source / linux-job (gh)
• Lint / python-source-and-configs / linux-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Push Binary Nightly / test-wheel-unix (macos, macos-latest, 3.9, cp39-cp39, cpu, cpu) (gh)
  TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'
• Unit-tests on Windows / unittests-cpu (3.10, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• Continuous Benchmark (PR) / GPU Pytest benchmark (gh)
  Process completed with exit code 2.
• Continuous Benchmark / GPU Pytest benchmark (gh)

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• Habitat Tests on Linux / tests (3.9, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Libs Tests on Linux / unittests-gym (3.9, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Libs Tests on Linux / unittests-sklearn (3.10, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• LLM Tests on Linux / unittests (3.9, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• SOTA Tests on Linux / tests (3.9, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.10) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.11) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.12) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.9) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-gpu (3.11, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-olddeps (3.9, 11.6) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-optdeps (3.11, 12.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-stable-gpu (3.10, 11.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• Continuous Benchmark / CPU Pytest benchmark (gh) (trunk failure)
  Process completed with exit code 2.
• Push Binary Nightly / test-wheel-unix (linux, ubuntu-22.04, 3.9, cp39-cp39, cpu, cpu) (gh) (trunk failure)
• Push Binary Nightly / test-wheel-windows (3.9, 3.9) (gh) (trunk failure)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[Copilot]

Pull Request Overview

This PR fixes a missing import in the LSTM example docstring to ensure the code snippet runs without errors.

• Add LSTMModule to the import statement alongside MLP in the docstring example

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[vmoens]

LGTM thanks!