Bump pip from 23.2.1 to 23.3.1 in /requirements (#1496)

* Bump pip from 23.2.1 to 23.3.1 in /requirements

Bumps [pip](https://github.com/pypa/pip) from 23.2.1 to 23.3.1.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.2.1...23.3.1)

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

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

* Update tests

Since the log output is slightly less verbose with the new
version of pip

* Add changelog entry

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ed Morley <501702+edmorley@users.noreply.github.com>

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Updated pip from 23.2.1 to 23.3.1. ([#1496](https://github.com/heroku/heroku-buildpack-python/pull/1496))
 
 ## v237 (2023-10-03)
 

requirements/pip.txt

@@ -1 +1 @@
-pip==23.2.1
+pip==23.3.1

spec/hatchet/pip_spec.rb

@@ -26,7 +26,6 @@
           remote: -----> Installing SQLite3
           remote: -----> Installing requirements with pip
           remote:        Collecting urllib3 \\(from -r requirements.txt \\(line 1\\)\\)
-          remote:          Obtaining dependency information for urllib3 from .*
           remote:          Downloading urllib3-.*
           remote:        Downloading urllib3-.*
           remote:        Installing collected packages: urllib3
@@ -67,7 +66,6 @@
           remote: -----> Installing SQLite3
           remote: -----> Installing requirements with pip
           remote:        Collecting urllib3 \\(from -r requirements.txt \\(line 1\\)\\)
-          remote:          Obtaining dependency information for urllib3 from .*
           remote:          Downloading urllib3-.*
           remote:        Collecting six \\(from -r requirements.txt \\(line 2\\)\\)
           remote:          Downloading six-.*