Bump snok/install-poetry from 1.1.6 to 1.2

Bumps [snok/install-poetry](https://github.com/snok/install-poetry) from 1.1.6 to 1.2.
- [Release notes](https://github.com/snok/install-poetry/releases)
- [Commits](snok/install-poetry@v1.1.6...v1.2)

---
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/build.yml

@@ -30,7 +30,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: snok/install-poetry@v1.1.6
+      - uses: snok/install-poetry@v1.2
         with:
           virtualenvs-create: true
 

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2
-    - uses: snok/install-poetry@v1.1.6
+    - uses: snok/install-poetry@v1.2
       with:
         virtualenvs-create: true
     - name: Publish to PyPI