do not copy Cargo.toml, fix username

Author: marcoieni

.github/workflows/example-sync.yaml

@@ -23,7 +23,7 @@ jobs:
  - name: replace username
 run: |
  cd rust-gh-example
- sed -i 's#{\[username\]}#MyUsername#g' $(find . -type f -name '*.md' -o -name '*.yml' -o -name '*.toml')
+ sed -i 's#{\[username\]}#rust-github#g' $(find . -type f -name '*.md' -o -name '*.yml' -o -name '*.toml')
 
  - name: Checkout old example
 uses: actions/checkout@v2
@@ -32,14 +32,16 @@ jobs:
 path: old_example
 ssh-key: ${{secrets.GH_EXAMPLE_DEPLOY_SECRET }}
 
- - name: move sources from old to new example
+ - name: move sources and Cargo.toml from old to new example
 run: |
  echo "pwd:"
  pwd
  echo "ls -al:"
  ls -al
  rm rust-gh-example/src/main.rs
+ rm rust-gh-example/Cargo.toml
  cp old_example/src/* rust-gh-example/src/
+ cp old_example/Cargo.toml rust-gh-example/Cargo.toml
 
  - name: update example
 run: |