⬆️ Update flash-attn requirement from ~=2.6.3 to >=2.6.3,<2.8.0

Updates the requirements on [flash-attn](https://github.com/Dao-AILab/flash-attention) to permit the latest version.
- [Release notes](https://github.com/Dao-AILab/flash-attention/releases)
- [Commits](Dao-AILab/flash-attention@v2.6.3...v2.7.0.post2)

---
updated-dependencies:
- dependency-name: flash-attn
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -41,7 +41,7 @@ dependencies = [
     "accelerate>=0.33,<1.1",
     "sentencepiece~=0.2.0",
     "peft>=0.12,<0.14",
-    "flash-attn~=2.6.3; sys_platform != 'darwin'",
+    "flash-attn>=2.6.3,<2.8.0; sys_platform != 'darwin'",
     "einops~=0.8.0",
     "timm~=1.0.9",
     "typer~=0.12.5",