Update README.md

Add fewer permissions to configuration, fix type in repository name, define additional steps needed for Setup guide to be working.

README.md

@@ -19,7 +19,9 @@ review process.
 2. Add the OpenAI API key as a GitHub Secret in your repository with the name `OPENAI_API_KEY`. You can find more
    information about GitHub Secrets [here](https://docs.github.com/en/actions/reference/encrypted-secrets).
 
-3. Create a `.github/workflows/main.yml` file in your repository and add the following content:
+3. Fork this repository to your personal space or organization.
+
+4. Create a `.github/workflows/main.yml` file in your repository and add the following content:
 
 ```yaml
 name: AI Code Reviewer
@@ -29,7 +31,9 @@ on:
     types:
       - opened
       - synchronize
-permissions: write-all
+permissions:
+  contents: read
+  pull-requests: write
 jobs:
   review:
     runs-on: ubuntu-latest
@@ -38,7 +42,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: AI Code Reviewer
-        uses: your-username/ai-code-reviewer@main
+        uses: your-username/ai-codereviewer@main
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # The GITHUB_TOKEN is there by default so you just need to keep it like it is and not necessarily need to add it as secret as it will throw an error. [More Details](https://docs.github.com/en/actions/security-guides/automatic-token-authentication#about-the-github_token-secret)
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
@@ -46,8 +50,8 @@ jobs:
           exclude: "**/*.json, **/*.md" # Optional: exclude patterns separated by commas
 ```
 
-4. Replace `your-username` with your GitHub username or organization name where the AI Code Reviewer repository is
-   located.
+4. Replace `your-username` with your GitHub username or organization name where the AI Code Reviewer repository was forked
+   to.
 
 5. Customize the `exclude` input if you want to ignore certain file patterns from being reviewed.