Remove extra spaces in summarization prompt

[kinance]

Background

Left some extra spaces in the summarization prompt when making the batch summarization change #4652

Changes

Removed the extra spaces

Test Plan

Reran the tests and succeeded

PR Quality Checklist

• My pull request is atomic and focuses on a single change.
• I have thoroughly tested my changes with multiple different prompts.
• I have considered potential risks and mitigations for my changes.
• I have documented my changes clearly and comprehensively.
• I have not snuck in any "extra" small tweaks changes.
• I have run the following commands against my code to ensure it passes our linters:

  black .
  isort .
  mypy
  autoflake --remove-all-unused-imports --recursive --ignore-init-module-imports --ignore-pass-after-docstring autogpt tests --in-place

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.05 🎉

Comparison is base (62dd167) 70.01% compared to head (04f7ab2) 70.06%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4660      +/-   ##
==========================================
+ Coverage   70.01%   70.06%   +0.05%     
==========================================
  Files          72       72              
  Lines        3598     3598              
  Branches      572      572              
==========================================
+ Hits         2519     2521       +2     
+ Misses        895      894       -1     
+ Partials      184      183       -1     

Impacted Files	Coverage Δ
autogpt/memory/message_history.py	85.41% <ø> (ø)

... and 1 file with indirect coverage changes

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[Pwuts]

Thanks!

[Auto-GPT-Bot]

You changed AutoGPT's behaviour. The cassettes have been updated and will be merged to the submodule when this Pull Request gets merged.