chore(deps): bump ipython in /infra/containers/sandbox

Bumps [ipython](https://github.com/ipython/ipython) from 9.13.0 to 9.15.0.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@9.13.0...9.15.0)

---
updated-dependencies:
- dependency-name: ipython
  dependency-version: 9.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

infra/containers/sandbox/requirements.in

@@ -3,7 +3,7 @@ pandas==2.3.3
 matplotlib==3.10.7
 openpyxl==3.1.5
 pillow==12.3.0
-ipython==9.13.0
+ipython==9.15.0
 defusedxml
 lxml
 pdf2image

infra/containers/sandbox/requirements.txt

@@ -503,9 +503,9 @@ idna==3.18 \
     --hash=sha256:7f952cbe720b688055e3f87de14f5c3e5fdaa8bc3928985c4077ca689de849a2 \
     --hash=sha256:ffb385a7e039654cef1ab9ef32c6fafe283c0c0467bba1d9029738ce4a14a848
     # via requests
-ipython==9.13.0 \
-    --hash=sha256:57f9d4639e20818d328d287c7b549af3d05f12486ea8f2e7f73e52a36ec4d201 \
-    --hash=sha256:7e834b6afc99f020e3f05966ced34792f40267d64cb1ea9043886dab0dde5967
+ipython==9.15.0 \
+    --hash=sha256:515ad9c3cdf0c932a5a9f6245419e8aba706b7bd03c3e1d3a1c83d9351d6aa6e \
+    --hash=sha256:da2819ce2aa83135257df830660b1176d986c3d2876db24df01974fa955b2756
     # via -r requirements.in
 ipython-pygments-lexers==1.1.1 \
     --hash=sha256:09c0138009e56b6854f9535736f4171d855c8c08a563a0dcd8022f78355c7e81 \
@@ -783,7 +783,7 @@ markdownify==1.2.3 \
     --hash=sha256:1a176f05522c8a2cb1dd3ab9d307dcdadbed5c26ae717855bfc42b3b6d38d937 \
     --hash=sha256:a189a0bedfd14009030fde5f85bb6f77c56897cb839b5c25315dd7d4e3e290ba
     # via markitdown
-markitdown==0.1.6 \
+markitdown[pptx]==0.1.6 \
     --hash=sha256:07b2d5bf87b5c53e13a9f2fdc440df8ccc85e26f40c1e557781727b700049775 \
     --hash=sha256:e5bdbaffd971b29598c7c39ef0e9afce2f08c0751fbfa4e4257678ebaf8cfc7e
     # via -r requirements.in
@@ -1298,7 +1298,6 @@ typing-extensions==4.16.0 \
     --hash=sha256:dc983d19a509c94dba722ee6abd33940f7c05a89e243c47e907eb4db6f1a43e5
     # via
     #   beautifulsoup4
-    #   ipython
     #   pyee
     #   python-pptx
 tzdata==2026.3 \