Remove ppbt as install requirement

.github/workflows/docs-action.yml

@@ -11,13 +11,18 @@ on:
 jobs:
   docs:
     name: Build Relenv Documentation
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
+      - name: Setup Python 3.11
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.11
+
       - name: Install System Deps
         run: |
           sudo apt-get update
-          sudo apt-get install -y enchant git gcc imagemagick make zlib1g-dev libc-dev libffi-dev g++ libxml2 libxml2-dev libxslt-dev libcurl4-openssl-dev libssl-dev libgnutls28-dev xz-utils
+          sudo apt-get install -y enchant-2 git gcc imagemagick make zlib1g-dev libc-dev libffi-dev g++ libxml2 libxml2-dev libxslt-dev libcurl4-openssl-dev libssl-dev libgnutls28-dev xz-utils
 
       - uses: actions/checkout@v3
         with:

setup.cfg

@@ -17,13 +17,15 @@ packages = find:
 package_dir =
   relenv = relenv
 include_package_data = True
-install_requires =
-    ppbt; sys_platform == "linux"
+
 
 [options.entry_points]
 console_scripts =
     relenv = relenv.__main__:main
 
+[options.extras_require]
+toolchain = ppbt
+
 [sdist]
 owner = root
 group = root