Bump mcp from 1.20.0 to 1.23.0 in /samples/adk-sql-agent

Bumps [mcp](https://github.com/modelcontextprotocol/python-sdk) from 1.20.0 to 1.23.0.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.20.0...v1.23.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.23.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

samples/adk-sql-agent/requirements.txt

@@ -585,9 +585,9 @@ markupsafe==3.0.3 \
     --hash=sha256:f3e98bb3798ead92273dc0e5fd0f31ade220f59a266ffd8a4f6065e0a3ce0523 \
     --hash=sha256:fed51ac40f757d41b7c48425901843666a6677e3e8eb0abcff09e4ba6e664f50
     # via mako
-mcp==1.20.0 \
-    --hash=sha256:9ccc09eaadbfbcbbdab1c9723cfe2e0d1d9e324d7d3ce7e332ef90b09ed35177 \
-    --hash=sha256:d0dc06f93653f7432ff89f694721c87f79876b6f93741bf628ad1e48f7ac5e5d
+mcp==1.23.0 \
+    --hash=sha256:5a645cf111ed329f4619f2629a3f15d9aabd7adc2ea09d600d31467b51ecb64f \
+    --hash=sha256:84e0c29316d0a8cf0affd196fd000487ac512aa3f771b63b2ea864e22961772b
     # via google-adk
 numpy==2.3.4 \
     --hash=sha256:035796aaaddfe2f9664b9a9372f089cfc88bd795a67bd1bfe15e6e770934cf64 \