fix: modify the shape for graph mode of informer #47

[LongxingTan]

Description

This PR ...

Checklist

• [ ] Linked issues (if existing)
• [ ] Amended changelog.md for large changes (and added myself there as contributor)
• [ ] Added/modified tests
• [ ] Used pre-commit hooks when committing to ensure that code is compliant with hooks. Install hooks with pre-commit install. To run hooks independent of commit, execute pre-commit run --all-files

Thank you for joining. Have fun coding!

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (4b179e8) 88.97% compared to head (c3b2e11) 89.07%.

:exclamation: Current head c3b2e11 differs from pull request most recent head 12116e1. Consider uploading reports for the commit 12116e1 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #49 +/- ## ========================================== + Coverage 88.97% 89.07% +0.09% ========================================== Files 27 27 Lines 2132 2133 +1 ========================================== + Hits 1897 1900 +3 + Misses 235 233 -2 ``` | [Flag](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [cpu](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `89.07% <100.00%> (+0.09%)` | :arrow_up: | | [unittest](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `89.07% <100.00%> (+0.09%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [tfts/layers/attention\_layer.py](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#diff-dGZ0cy9sYXllcnMvYXR0ZW50aW9uX2xheWVyLnB5) | `90.00% <100.00%> (+0.06%)` | :arrow_up: | | [tfts/layers/mask\_layer.py](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#diff-dGZ0cy9sYXllcnMvbWFza19sYXllci5weQ==) | `100.00% <100.00%> (ø)` | | | [tfts/models/informer.py](https://app.codecov.io/gh/LongxingTan/Time-series-prediction/pull/49?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#diff-dGZ0cy9tb2RlbHMvaW5mb3JtZXIucHk=) | `91.41% <ø> (+1.22%)` | :arrow_up: |

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