Bump h2 from 4.1.0 to 4.3.0 in /app/backend (#2705)

Bumps [h2](https://github.com/python-hyper/h2) from 4.1.0 to 4.3.0.
- [Changelog](https://github.com/python-hyper/h2/blob/master/CHANGELOG.rst)
- [Commits](python-hyper/h2@v4.1.0...v4.3.0)

---
updated-dependencies:
- dependency-name: h2
  dependency-version: 4.3.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

app/backend/requirements.txt

@@ -50,6 +50,7 @@ azure-cosmos==4.9.0
 azure-identity==1.17.1
     # via
     #   -r requirements.in
+    #   azure-monitor-opentelemetry-exporter
     #   msgraph-sdk
 azure-monitor-opentelemetry==1.6.13
     # via -r requirements.in
@@ -92,10 +93,6 @@ cryptography==44.0.1
     #   azure-storage-blob
     #   msal
     #   pyjwt
-deprecated==1.2.14
-    # via
-    #   opentelemetry-api
-    #   opentelemetry-semantic-conventions
 distro==1.9.0
     # via openai
 exceptiongroup==1.3.0
@@ -117,11 +114,11 @@ h11==0.16.0
     #   hypercorn
     #   uvicorn
     #   wsproto
-h2==4.1.0
+h2==4.3.0
     # via
     #   httpx
     #   hypercorn
-hpack==4.0.0
+hpack==4.1.0
     # via h2
 httpcore==1.0.9
     # via httpx
@@ -132,7 +129,7 @@ httpx[http2]==0.27.0
     #   openai
 hypercorn==0.17.3
     # via quart
-hyperframe==6.0.1
+hyperframe==6.1.0
     # via h2
 idna==3.10
     # via
@@ -426,7 +423,9 @@ typing-extensions==4.13.2
     #   exceptiongroup
     #   hypercorn
     #   openai
+    #   opentelemetry-api
     #   opentelemetry-sdk
+    #   opentelemetry-semantic-conventions
     #   pydantic
     #   pydantic-core
     #   pypdf
@@ -445,7 +444,6 @@ werkzeug==3.0.6
     #   quart
 wrapt==1.16.0
     # via
-    #   deprecated
     #   opentelemetry-instrumentation
     #   opentelemetry-instrumentation-aiohttp-client
     #   opentelemetry-instrumentation-dbapi