build(deps): bump the dev-dependencies group across 1 directory with 3 updates

Bumps the dev-dependencies group with 3 updates in the / directory: [fastapi](https://github.com/fastapi/fastapi), [langchain](https://github.com/langchain-ai/langchain) and [python-pptx](https://github.com/scanny/python-pptx).


Updates `fastapi` from 0.111.1 to 0.112.0
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.111.1...0.112.0)

Updates `langchain` from 0.2.11 to 0.2.12
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.2.11...langchain==0.2.12)

Updates `python-pptx` from 0.6.23 to 1.0.1
- [Changelog](https://github.com/scanny/python-pptx/blob/master/HISTORY.rst)
- [Commits](scanny/python-pptx@v0.6.23...v1.0.1)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: langchain
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: python-pptx
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dev-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
-fastapi==0.111.1
-langchain==0.2.11
+fastapi==0.112.0
+langchain==0.2.12
 pydantic==2.8.2
 pymupdf==1.24.9
-python_pptx==0.6.23
+python_pptx==1.0.1
 PyYAML==6.0.1