CI: update Poetry installation command to the latest one

Author: stanislaw

.github/workflows/ci-linux.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.10, 3.11]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v2
@@ -21,14 +21,15 @@ jobs:
     - name: Upgrade pip
       run: |
         python -m pip install --upgrade pip
+        python -m pip install --upgrade setuptools
 
     - name: Install Poetry
       run: |
-        curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
+        curl -sSL https://install.python-poetry.org | python3 -
 
     - name: Add Poetry to PATH
       run: |
-        echo "PATH=$PATH:$HOME/.poetry/bin" >> $GITHUB_ENV
+        echo "PATH=$PATH:$HOME/.local/bin" >> $GITHUB_ENV
 
     - name: Install dependencies
       run: |

.github/workflows/ci-mac.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.10, 3.11]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v2
@@ -24,11 +24,11 @@ jobs:
 
     - name: Install Poetry
       run: |
-        curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
+        curl -sSL https://install.python-poetry.org | python3 -
 
     - name: Add Poetry to PATH
       run: |
-        echo "PATH=$PATH:$HOME/.poetry/bin" >> $GITHUB_ENV
+        echo "PATH=$PATH:~/.local/bin" >> $GITHUB_ENV
 
     - name: Install dependencies
       run: |

.github/workflows/ci-windows.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.10, 3.11]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v2
@@ -24,11 +24,11 @@ jobs:
 
     - name: Install Poetry
       run: |
-        (Invoke-WebRequest -Uri https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py -UseBasicParsing).Content | python
+        (Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | py -
 
     - name: "Poetry: add to %PATH%"
       run: |
-        echo "$env:USERPROFILE\.poetry\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+        echo "%APPDATA%\pypoetry" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
     - name: "Print Debug info"
       run: |