Update lock file for Poetry v1.2.0 (#13689)

docs/development/contributing_guide.md

@@ -62,6 +62,8 @@ pipx install poetry
 but see poetry's [installation instructions](https://python-poetry.org/docs/#installation)
 for other installation methods.
 
+Synapse requires Poetry version 1.2.0 or later.
+
 Next, open a terminal and install dependencies as follows:
 
 ```sh

docs/development/dependencies.md

@@ -243,14 +243,11 @@ doesn't require poetry. (It's what we use in CI too). However, you could try
 
 ## Check the version of poetry with `poetry --version`.
 
-At the time of writing, the 1.2 series is beta only. We have seen some examples
-where the lockfiles generated by 1.2 prereleasese aren't interpreted correctly
-by poetry 1.1.x. For now, use poetry 1.1.14, which includes a critical
-[change](https://github.com/python-poetry/poetry/pull/5973) needed to remain
-[compatible with PyPI](https://github.com/pypi/warehouse/pull/11775).
+The minimum version of poetry supported by Synapse is 1.2.
 
 It can also be useful to check the version of `poetry-core` in use. If you've
-installed `poetry` with `pipx`, try `pipx runpip poetry list | grep poetry-core`.
+installed `poetry` with `pipx`, try `pipx runpip poetry list | grep
+poetry-core`.
 
 ## Clear caches: `poetry cache clear --all pypi`.