Github Actions: Removed colors from ascii plots for CI log rendering

Signed-off-by: Grzegorz Latosinski <glatosinski@antmicro.com>

.github/workflows/test.yml

@@ -15,12 +15,17 @@ jobs:
             - name: Install dependencies
               run: |
                   sudo apt-get update
-                  sudo apt-get install -qqy --no-install-recommends python3 python3-pip git
+                  sudo apt-get install -qqy --no-install-recommends python3 python3-pip git colorized-logs
                   sudo pip3 install git+https://github.com/antmicro/tuttest.git
             - name: Run README.md snippets
               run: |
                   sudo ./scripts/test.sh
-                  cat plot.ascii
+                  cat plot.ascii | ansi2txt
+                  echo -en '## Sargraph summary\n\n' >> $GITHUB_STEP_SUMMARY
+                  echo -en '```\n' >> $GITHUB_STEP_SUMMARY
+                  cat plot.ascii | ansi2txt >> $GITHUB_STEP_SUMMARY
+                  echo -en '\n```\n' >> $GITHUB_STEP_SUMMARY
+
             - name: Upload artifacts
               if: always()
               uses: actions/upload-artifact@v3