build(deps): bump the pip group across 2 directories with 2 updates

Bumps the pip group with 2 updates in the / directory: [langchain-community](https://github.com/langchain-ai/langchain) and [pypdf](https://github.com/py-pdf/pypdf).
Bumps the pip group with 2 updates in the /backend directory: [langchain-community](https://github.com/langchain-ai/langchain) and [pypdf](https://github.com/py-pdf/pypdf).


Updates `langchain-community` from 0.3.26 to 0.3.27
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain==0.3.26...langchain==0.3.27)

Updates `pypdf` from 4.3.1 to 6.0.0
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](https://github.com/py-pdf/pypdf/compare/4.3.1...6.0.0)

Updates `langchain-community` from 0.3.26 to 0.3.27
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain==0.3.26...langchain==0.3.27)

Updates `pypdf` from 4.3.1 to 6.0.0
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](https://github.com/py-pdf/pypdf/compare/4.3.1...6.0.0)

---
updated-dependencies:
- dependency-name: langchain-community
  dependency-version: 0.3.27
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: pypdf
  dependency-version: 6.0.0
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: langchain-community
  dependency-version: 0.3.27
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: pypdf
  dependency-version: 6.0.0
  dependency-type: direct:production
  dependency-group: pip
...

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

backend/requirements.txt

@@ -47,7 +47,7 @@ google-generativeai==0.8.5
 tiktoken
 
 langchain==0.3.26
-langchain-community==0.3.26
+langchain-community==0.3.27
 
 fake-useragent==2.2.0
 chromadb==0.6.3
@@ -70,7 +70,7 @@ einops==0.8.1
 
 
 ftfy==6.2.3
-pypdf==4.3.1
+pypdf==6.0.0
 fpdf2==2.8.2
 pymdown-extensions==10.14.2
 docx2txt==0.8

pyproject.toml

@@ -52,7 +52,7 @@ dependencies = [
     "google-generativeai==0.8.5",
 
     "langchain==0.3.26",
-    "langchain-community==0.3.26",
+    "langchain-community==0.3.27",
 
     "fake-useragent==2.2.0",
     "chromadb==0.6.3",
@@ -72,7 +72,7 @@ dependencies = [
     "einops==0.8.1",
 
     "ftfy==6.2.3",
-    "pypdf==4.3.1",
+    "pypdf==6.0.0",
     "fpdf2==2.8.2",
     "pymdown-extensions==10.14.2",
     "docx2txt==0.8",