Modify workflows

.github/workflows/build.yml

@@ -3,7 +3,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
   schedule:
     - cron: '00 01 * * *'
 

.github/workflows/cachix.yml

@@ -1,26 +0,0 @@
-# Publish the Nix flake outputs to Cachix
-name: Cachix
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-  publish:
-    name: Publish Flake
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout sources
-      uses: actions/checkout@v3
-
-    - name: Install nix
-      uses: cachix/install-nix-action@v17
-
-    - name: Authenticate with Cachix
-      uses: cachix/cachix-action@v10
-      with:
-        name: helix
-        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-
-    - name: Build nix flake
-      run: nix build -L

.github/workflows/gh-pages.yml

@@ -1,41 +0,0 @@
-name: Github Pages
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - '*'
-
-jobs:
-  deploy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v1
-        with:
-          mdbook-version: 'latest'
-          # mdbook-version: '0.4.8'
-
-      - run: mdbook build book
-      
-      - name: Set output directory
-        run: |
-          OUTDIR=$(basename ${{ github.ref }})
-          echo "OUTDIR=$OUTDIR" >> $GITHUB_ENV
-
-      - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./book/book
-          destination_dir: ./${{ env.OUTDIR }}
-
-      - name: Deploy stable
-        uses: peaceiris/actions-gh-pages@v3
-        if: startswith(github.ref, 'refs/tags/')
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./book/book