fix: corrections of GitHub Actions related to problem with Cairo library

correct setting of path to MSYS2 instance of Cairo library, setting is dynamic so switch to MSYS2 UCRT64 from MINGW64 should be easy

Author: dornech

.github/workflows/documentation.yml

@@ -42,15 +42,16 @@ jobs:
       - name: Install Cairo via MSYS2
         uses: msys2/setup-msys2@v2
         with:
+          msystem: MINGW64
+          path-type: inherit
           update: true
           install: mingw-w64-x86_64-cairo
       - name: Add MSYS2 Cairo to PATH to make cairocffi libraries like libcairo-2.dll discoverable
-        shell: powershell
-        # "C:\msys64\mingw64\bin" did not work, try "C:\Program Files\Unity Hub\resources\app.asar.unpacked\node_modules\canvas\build\Release"
-        # found using Get-ChildItem -Path C:\ -Filter "*libcairo*.d*" -File -Recurse -ErrorAction SilentlyContinue in Log step
+        shell: msys2 {0}
         run: |
-          echo "C:\Program Files\Unity Hub\resources\app.asar.unpacked\node_modules\canvas\build\Release" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-          echo "CAIROCFFI_DLL_DIRECTORIES=C:\Program Files\Unity Hub\resources\app.asar.unpacked\node_modules\canvas\build\Release" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          echo "CAIRO_DLL=$(cygpath -w /${MSYSTEM,,}/bin/libcairo-2.dll)" >> $GITHUB_ENV
+          echo "CAIROCFFI_DLL_DIRECTORIES=$(cygpath -w /${MSYSTEM,,}/bin)" >> $GITHUB_ENV
+          echo "$(cygpath -w /${MSYSTEM,,}/bin)" >> $GITHUB_PATH
       - name: Log environment variable updates
         shell: powershell
         run: |

.github/workflows/documentation_testbuild.yml

@@ -1,6 +1,7 @@
 name: Test Documentation Build
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - '*'
@@ -29,15 +30,16 @@ jobs:
       - name: Install Cairo via MSYS2
         uses: msys2/setup-msys2@v2
         with:
+          msystem: MINGW64
+          path-type: inherit
           update: true
           install: mingw-w64-x86_64-cairo
       - name: Add MSYS2 Cairo to PATH to make cairocffi libraries like libcairo-2.dll discoverable
-        shell: powershell
-        # "C:\msys64\mingw64\bin" did not work, try "C:\Program Files\Unity Hub\resources\app.asar.unpacked\node_modules\canvas\build\Release"
-        # found using Get-ChildItem -Path C:\ -Filter "*libcairo*.d*" -File -Recurse -ErrorAction SilentlyContinue in Log step
+        shell: msys2 {0}
         run: |
-          echo "C:\Program Files\Unity Hub\resources\app.asar.unpacked\node_modules\canvas\build\Release" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-          echo "CAIROCFFI_DLL_DIRECTORIES=C:\Program Files\Unity Hub\resources\app.asar.unpacked\node_modules\canvas\build\Release" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          echo "CAIRO_DLL=$(cygpath -w /${MSYSTEM,,}/bin/libcairo-2.dll)" >> $GITHUB_ENV
+          echo "CAIROCFFI_DLL_DIRECTORIES=$(cygpath -w /${MSYSTEM,,}/bin)" >> $GITHUB_ENV
+          echo "$(cygpath -w /${MSYSTEM,,}/bin)" >> $GITHUB_PATH
       - name: Log environment variable updates
         shell: powershell
         run: |