Bump the pip group with 2 updates

Bumps the pip group with 2 updates: [mypy](https://github.com/python/mypy) and [sigstore](https://github.com/sigstore/sigstore-python).


Updates `mypy` from 2.3.0 to 2.3.1
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v2.3.0...v2.3.1)

Updates `sigstore` from 4.4.0 to 4.5.0
- [Release notes](https://github.com/sigstore/sigstore-python/releases)
- [Changelog](https://github.com/sigstore/sigstore-python/blob/main/CHANGELOG.md)
- [Commits](sigstore/sigstore-python@v4.4.0...v4.5.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip
- dependency-name: sigstore
  dependency-version: 4.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pip
...

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

Author: dependabot[bot]

mypy-requirements.txt

@@ -1,10 +1,10 @@
 aiohttp==3.14.3
 alive_progress>=3.3.0
-mypy==2.3.0
+mypy==2.3.1
 pyfakefs
 pytest
 pytest-mock
 python-gnupg  # untyped :(
-sigstore==4.4.0
+sigstore==4.5.0
 types-paramiko
 types-requests

requirements.in

@@ -5,4 +5,4 @@ alive_progress>=3.3.0
 python-gnupg
 aiohttp
 blurb>=1.2.1
-sigstore>=4.4.0
+sigstore>=4.5.0

requirements.txt

@@ -924,8 +924,8 @@ rich==13.9.4 \
 securesystemslib==1.2.0 \
     --hash=sha256:fa63abcb1cf4dba4f2df964f623baa45bc39029980d7a0a2119d90731942afc6
     # via tuf
-sigstore==4.4.0 \
-    --hash=sha256:80c36d08b02479e2a282d0bea93de68fe0d43a93b0d58e4d9ac6bb9f8425957c
+sigstore==4.5.0 \
+    --hash=sha256:f045b207f2e12605cf775ec38e89c5eda625d71ffa7830477db65e47ec2bc8b2
     # via -r requirements.in
 sigstore-models==0.0.6 \
     --hash=sha256:5201a68f4d7d0f8bec1e2f4378eb646b084c52609a4e31db8c385095fff68b2e