chore(deps): update astrapy requirement in /integrations/astra

Updates the requirements on [astrapy](https://github.com/datastax/astrapy) to permit the latest version.
- [Release notes](https://github.com/datastax/astrapy/releases)
- [Changelog](https://github.com/datastax/astrapy/blob/main/CHANGES)
- [Commits](datastax/astrapy@v1.5.2...v2.2.1)

---
updated-dependencies:
- dependency-name: astrapy
  dependency-version: 2.2.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

integrations/astra/examples/requirements.txt

@@ -1,4 +1,4 @@
 haystack-ai
 sentence_transformers==2.2.2
 openai==1.6.1
-astrapy>=1.5.0,<2.0
+astrapy>=2.2.1,<3.0

integrations/astra/pyproject.toml

@@ -24,7 +24,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
 dependencies = [
-  "astrapy>=1.5.2,<2.0",
+  "astrapy>=2.2.1,<3.0",
   "haystack-ai>=2.26.1",
   "pydantic",
   "typing_extensions",