WIP: Try to simplify the powershell file piping

Author: mstorsjo

.github/workflows/build.yml

@@ -738,8 +738,8 @@ jobs:
           Expand-Archive llvm-mingw-*.zip -DestinationPath .
           del llvm-mingw-*.zip
           mv llvm-mingw-* c:\llvm-mingw
-          echo "c:\llvm-mingw\busybox\bin" | Out-File -FilePath $Env:GITHUB_PATH -Encoding utf8 -Append
-          echo "c:\llvm-mingw\bin" | Out-File -FilePath $Env:GITHUB_PATH -Encoding utf8 -Append
+          echo "c:\llvm-mingw\busybox\bin" >> $Env:GITHUB_PATH
+          echo "c:\llvm-mingw\bin" >> $Env:GITHUB_PATH
       - uses: actions/checkout@v4
       - name: Checkout ffmpeg
         uses: actions/checkout@v4
@@ -777,7 +777,7 @@ jobs:
           cd ffmpeg-build
           mingw32-make fate-rsync
           cd ..
-          echo "hash=$(sh -c "find fate-samples -type f | sort | sha256sum | cut -d' ' -f1")" | Out-File -FilePath $Env:GITHUB_OUTPUT -Encoding utf8 -Append
+          echo "hash=$(sh -c "find fate-samples -type f | sort | sha256sum | cut -d' ' -f1")" >> $Env:GITHUB_OUTPUT
       - name: Cache Fate-Suite
         uses: actions/cache/save@v4
         if: ${{ format('fate-samples-{0}', steps.rsync.outputs.hash) != steps.cache.outputs.cache-matched-key }}