Bump pip from 23.1.2 to 23.2 in /requirements (#1465)

* Bump pip from 23.1.2 to 23.2 in /requirements

Bumps [pip](https://github.com/pypa/pip) from 23.1.2 to 23.2.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.1.2...23.2)

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

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

* Add changelog entry

* Update test assertion for change in pip install output

---------

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>

GUS-W-12345619.

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Updated pip from 23.1.2 to 23.2. ([#1465](https://github.com/heroku/heroku-buildpack-python/pull/1465))
 - Update the Python 3.7 deprecation message to reflect that it has now reached end-of-life. ([#1460](https://github.com/heroku/heroku-buildpack-python/pull/1460))
 
 ## v233 (2023-06-07)

requirements/pip.txt

@@ -1 +1 @@
-pip==23.1.2
+pip==23.2

spec/hatchet/pip_spec.rb

@@ -26,7 +26,9 @@
           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
           remote:        Successfully installed urllib3-.*
         REGEX
@@ -65,9 +67,11 @@
           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-.*
+          remote:        Downloading urllib3-.*
           remote:        Installing collected packages: urllib3, six
           remote:        Successfully installed six-.* urllib3-.*
         REGEX