fix: add git pull --rebase before push in workflows

[ImBIOS]

What Changed

Added git pull --rebase origin main before git push in both GitHub Actions workflows:

• daily-benchmark.yml: Added rebase step before pushing benchmark results and README updates
• daily-updates.yml: Added rebase step before pushing dependency updates

Why This Change

This prevents potential push conflicts in automated workflows when multiple commits are made to the main branch between the time the workflow starts and when it tries to push. The rebase ensures we have the latest changes before pushing.

Changes Made

# In both workflows:
+ git pull --rebase origin main
  git push

This is a defensive programming practice that makes the workflows more robust against race conditions.

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Latest commit: 7697970

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