Bump idna from 3.4 to 3.15 in /src/datagen/pii/privy

Bumps [idna](https://github.com/kjd/idna) from 3.4 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.4...v3.15)

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

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

Author: dependabot[bot]

src/datagen/pii/privy/requirements.bazel.txt

@@ -642,9 +642,9 @@ hypothesis-jsonschema==0.22.1 \
     --hash=sha256:082968cb86a6aac2369627b08753cbf714c08054b1ebfce3588e3756e652cde6 \
     --hash=sha256:5dd7449009f323e408a9aa64afb4d18bd1f60ea2eabf5bf152a510da728b34f2
     # via schemathesis
-idna==3.4 \
-    --hash=sha256:814f528e8dead7d329833b91c5faa87d60bf71824cd12a7530b5526063d02cb4 \
-    --hash=sha256:90b77e79eaa3eba6de819a0c442c0b4ceefc341a7a2ab77d7562bf49f425c5c2
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via
     #   anyio
     #   httpx
@@ -2183,7 +2183,6 @@ transformers[sentencepiece,torch]==4.30.0 \
     # via
     #   flair
     #   transformer-smaller-training-vocab
-    #   transformers
 typer==0.7.0 \
     --hash=sha256:b5e704f4e48ec263de1c0b3a2387cd405a13767d2f907f44c1a08cbad96f606d \
     --hash=sha256:ff797846578a9f2a201b53442aedeb543319466870fbe1c701eab66dd7681165