Bump snok/install-poetry from 1.1.8 to 1.2.1

Bumps [snok/install-poetry](https://github.com/snok/install-poetry) from 1.1.8 to 1.2.1.
- [Release notes](https://github.com/snok/install-poetry/releases)
- [Commits](snok/install-poetry@v1.1.8...v1.2.1)

---
updated-dependencies:
- dependency-name: snok/install-poetry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/main.yml

@@ -27,7 +27,7 @@ jobs:
           python-version: ${{ matrix.python }}
 
       - name: Install Poetry
-        uses: snok/install-poetry@v1.1.8
+        uses: snok/install-poetry@v1.2.1
         with:
           virtualenvs-create: false
           virtualenvs-in-project: false

.github/workflows/publish.yml

@@ -20,7 +20,7 @@ jobs:
           python-version: '3.8.9'
 
       - name: Install Poetry
-        uses: snok/install-poetry@v1.1.8
+        uses: snok/install-poetry@v1.2.1
         with:
           virtualenvs-create: false
           virtualenvs-in-project: false