Update output method, see also https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Author: Nicoretti

.github/workflows/:matrix:all.yml

@@ -26,7 +26,7 @@ jobs:
 
       - id: set-matrix
         run: |
-          echo "::set-output name=matrix::$(poetry run nox -s matrix:all)"
+          echo "matrix=$(poetry run nox -s matrix:all)" >> $GITHUB_OUTPUT
 
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}

.github/workflows/:matrix:exasol.yml

@@ -26,7 +26,7 @@ jobs:
 
       - id: set-matrix
         run: |
-          echo "::set-output name=matrix::$(poetry run nox -s matrix:exasol)"
+          echo "matrix=$(poetry run nox -s matrix:exasol)" >> $GITHUB_OUTPUT
 
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}

.github/workflows/:matrix:python.yml

@@ -26,7 +26,7 @@ jobs:
 
       - id: set-matrix
         run: |
-          echo "::set-output name=matrix::$(poetry run nox -s matrix:python)"
+          echo "matrix=$(poetry run nox -s matrix:python)" >> $GITHUB_OUTPUT
 
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}