CI: Add MSYS64 to path, in order to use a different echo

Author: amotl

.github/workflows/main.yml

@@ -39,6 +39,13 @@ jobs:
           pip install pycodestyle unittest-xml-reporting
           pip install .
 
+      - name: Adjust Windows PATH
+        if: startsWith(matrix.os, 'win')
+        shell: bash
+        run: |
+          echo "C:\msys64\usr\bin" >> $GITHUB_PATH
+          dir "C:\msys64\usr\bin"
+
       - name: Test
         shell: bash
         run: |