chore (deps): bump anthropic from 0.75.0 to 0.77.0 in /backend (baserow#4643)

Bumps [anthropic](https://github.com/anthropics/anthropic-sdk-python) from 0.75.0 to 0.77.0.
- [Release notes](https://github.com/anthropics/anthropic-sdk-python/releases)
- [Changelog](https://github.com/anthropics/anthropic-sdk-python/blob/main/CHANGELOG.md)
- [Commits](anthropics/anthropic-sdk-python@v0.75.0...v0.77.0)

---
updated-dependencies:
- dependency-name: anthropic
  dependency-version: 0.77.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -91,7 +91,7 @@ dependencies = [
     "langchain==0.3.27",
     "langchain-openai==0.3.35",
     "openai==2.14.0",
-    "anthropic==0.75.0",
+    "anthropic==0.77.0",
     "mistralai==1.1.0",
     "icalendar==6.3.2",
     "jira2markdown==0.5",