Fix grouping lines in GH actions output (#577)

composite/action.yml

@@ -154,7 +154,7 @@ runs:
     - name: Check for Python3
       id: python
       run: |
-        echo '##[group]Check for Python3'
+        echo '::group::Check for Python3'
         # we check version here just to execute `python3` with an argument
         # on Windows, there is a `python3.exe` that is a proxy to trigger installation from app store
         # command `which python3` finds that, but `python3 -V` does not return the version on stdout
@@ -174,7 +174,7 @@ runs:
         echo "Python that creates venv: $PYTHON_BIN"
         echo "PYTHON_BIN=$PYTHON_BIN" >> "$GITHUB_ENV"
         echo "version=$("$PYTHON_BIN" -V)" >> "$GITHUB_OUTPUT"
-        echo '##[endgroup]'
+        echo '::endgroup::'
       shell: bash
 
     - name: Detect OS
@@ -208,7 +208,7 @@ runs:
       env:
         PIP_OPTIONS: ${{ steps.os.outputs.pip-options }}
       run: |
-        echo '##[group]Create virtualenv'
+        echo '::group::Create virtualenv'
         echo "Python that creates venv: $PYTHON_BIN"
 
         echo "Creating virtual environment"
@@ -238,24 +238,24 @@ runs:
         PYTHON_VENV="$("$PYTHON_VENV" -c 'import sys; print(sys.executable)')"
         echo "Python in venv: $PYTHON_VENV"
         echo "PYTHON_VENV=$PYTHON_VENV" >> "$GITHUB_ENV"
-        echo '##[endgroup]'
+        echo '::endgroup::'
       shell: bash
 
     - name: Install Python dependencies
       run: |
-        echo '##[group]Install Python dependencies'
+        echo '::group::Install Python dependencies'
         # make sure wheel is installed, which improves installing our dependencies
         "$PYTHON_VENV" -m pip install wheel
         "$PYTHON_VENV" -m pip install -r "$GITHUB_ACTION_PATH/../python/requirements.txt"
-        echo '##[endgroup]'
+        echo '::endgroup::'
       shell: bash
 
     - name: Publish Test Results
       id: test-results
       run: |
-        echo '##[group]Publish Test Results'
+        echo '::group::Publish Test Results'
         "$PYTHON_VENV" "$GITHUB_ACTION_PATH/../python/publish_test_results.py"
-        echo '##[endgroup]'
+        echo '::endgroup::'
       env:
         GITHUB_TOKEN: ${{ inputs.github_token }}
         GITHUB_TOKEN_ACTOR: ${{ inputs.github_token_actor }}