ci: bump itk version and fix json rpc agent interface specification (#938)

# Description

There was a bug that did not specify separate agent interfaces in SUT
for jsonrpc transport - which resulted with go-v10 interface -
communicating with python-v10 through v03 compat for jsonrpc

- [ ] Follow the [`CONTRIBUTING`
Guide](https://github.com/a2aproject/a2a-python/blob/main/CONTRIBUTING.md).
- [ ] Make your Pull Request title in the
<https://www.conventionalcommits.org/> specification.
- Important Prefixes for
[release-please](https://github.com/googleapis/release-please):
- `fix:` which represents bug fixes, and correlates to a
[SemVer](https://semver.org/) patch.
- `feat:` represents a new feature, and correlates to a SemVer minor.
- `feat!:`, or `fix!:`, `refactor!:`, etc., which represent a breaking
change (indicated by the `!`) and will result in a SemVer major.
- [ ] Ensure the tests and linter pass (Run `bash scripts/format.sh`
from the repository root to format)
- [ ] Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕

Co-authored-by: Krzysztof Dziedzic <dziedzick@google.com>
Co-authored-by: Ivan Shymko <ishymko@google.com>

Author: 3 people

.github/workflows/itk.yaml

@@ -28,4 +28,4 @@ jobs:
         run: bash run_itk.sh
         working-directory: itk
         env:
-          A2A_SAMPLES_REVISION: itk-v0.1-alpha
+          A2A_SAMPLES_REVISION: itk-v.0.11-alpha

itk/main.py

@@ -263,6 +263,14 @@ async def main_async(http_port: int, grpc_port: int) -> None:
         AgentInterface(
             protocol_binding=TransportProtocol.JSONRPC,
             url=f'http://127.0.0.1:{http_port}/jsonrpc/',
+            protocol_version='1.0',
+        )
+    )
+    interfaces.append(
+        AgentInterface(
+            protocol_binding=TransportProtocol.JSONRPC,
+            url=f'http://127.0.0.1:{http_port}/jsonrpc/',
+            protocol_version='0.3',
         )
     )
     interfaces.append(