Bump pyasn1 from 0.6.3 to 0.6.4 in /src/backend

Bumps [pyasn1](https://github.com/pyasn1/pyasn1) from 0.6.3 to 0.6.4.
- [Release notes](https://github.com/pyasn1/pyasn1/releases)
- [Changelog](https://github.com/pyasn1/pyasn1/blob/main/CHANGES.rst)
- [Commits](pyasn1/pyasn1@v0.6.3...v0.6.4)

---
updated-dependencies:
- dependency-name: pyasn1
  dependency-version: 0.6.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/backend/pyproject.toml

@@ -66,7 +66,7 @@ dependencies = [
     "protobuf==6.33.6",
     "cryptography==47.0.0",
     "aiohttp==3.13.5",
-    "pyasn1==0.6.3",
+    "pyasn1==0.6.4",
     "nltk==3.9.4",
 ]