Update GitHub Actions to use Python 3.5

Co-authored-by: luzfcb <807599+luzfcb@users.noreply.github.com>

Author: Copilot

.github/workflows/build-test.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Configura python
         uses: actions/setup-python@v4
         with:
-          python-version: "2.7"
+          python-version: "3.5"
           cache: pip
 
       - name: Instala dependências

.github/workflows/github-pages.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Configura python
         uses: actions/setup-python@v6
         with:
-          python-version: "2.7"
+          python-version: "3.5"
           cache: pip
 
       - name: Instala dependências