chore(deps): bump idna

Bumps [idna](https://github.com/kjd/idna) from 3.11 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](https://github.com/kjd/idna/compare/v3.11...v3.15)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.15'
  dependency-type: direct:production
...

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

02-use-cases/A2A-multi-agent-incident-response/host_adk_agent/requirements.txt

@@ -235,7 +235,7 @@ httpx-sse==0.4.3
     #   mcp
 huggingface-hub==0.35.3
     # via tokenizers
-idna==3.11
+idna==3.15
     # via
     #   anyio
     #   httpx

02-use-cases/A2A-multi-agent-incident-response/monitoring_strands_agent/requirements.txt

@@ -63,7 +63,7 @@ httpx-sse==0.4.3
     # via
     #   a2a-sdk
     #   mcp
-idna==3.11
+idna==3.15
     # via
     #   anyio
     #   httpx

02-use-cases/A2A-multi-agent-incident-response/requirements.txt

@@ -46,7 +46,7 @@ httpx==0.28.1
     # via a2a-sdk
 httpx-sse==0.4.3
     # via a2a-sdk
-idna==3.11
+idna==3.15
     # via
     #   anyio
     #   httpx

02-use-cases/A2A-multi-agent-incident-response/web_search_openai_agents/requirements.txt

@@ -83,7 +83,7 @@ httpx-sse==0.4.3
     # via
     #   a2a-sdk
     #   mcp
-idna==3.11
+idna==3.15
     # via
     #   anyio
     #   httpx