Sync version between release and package (#349)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c0f1898..0dd82fc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -108,11 +108,13 @@
           github.event_name == 'push'
         run: |
           gh auth status
-          gh release delete v0.0.3 -y || true
+          VERSION="$(python setup.py --version)"
+          TITLE=$(date "+%Y-%m-%d %H:%M:%S")
           NOTES="Commit: ${GITHUB_COMMIT}
           Source: ${GITHUB_REF}"
 
-          gh release create v0.0.3 \
-            --title "Latest version" \
+          gh release delete "${VERSION}" -y || true
+          gh release create "${VERSION}" \
+            --title "${TITLE}" \
             --notes "${NOTES}" \
             ./dist/*
diff --git a/sphinx_airflow_theme/README.md b/sphinx_airflow_theme/README.md
index 2e7e502..6cfb948 100644
--- a/sphinx_airflow_theme/README.md
+++ b/sphinx_airflow_theme/README.md
@@ -32,25 +32,26 @@
     ```
 
 2.  To make Javascript and CSS code available for the theme, run the following command in the root directory:
-    ```
+    ```shell script
     ./site.sh build-site && ./site.sh prepare-theme
     ```
 
 3.  To install the required Python packages, in `<ROOT DIRECTORY>/sphinx_airflow_theme` run:
-    ```
+    ```shell script
     pip install -e .
     ```
 
 4.  To launch the demo documentation page, in `<ROOT DIRECTORY>/sphinx_airflow_theme/demo` run:
-    ```
+    ```shell script
     ./docs.sh build && ./docs.sh preview
     ```
 
 # Install developer version
 
 To install the latest development version of a theme, run:
-```
-pip install 'https://github.com/apache/airflow-site/releases/download/v0.0.3/sphinx_airflow_theme-0.0.3-py3-none-any.whl'
+```shell script
+THEME_VERSION="$(curl -s https://api.github.com/repos/apache/airflow-site/releases/latest | grep '"tag_name":' | cut -d '"' -f 4)"
+pip install "https://github.com/apache/airflow-site/releases/download/${THEME_VERSION}/sphinx_airflow_theme-${THEME_VERSION}-py3-none-any.whl"
 ```
 Python packages for your PRs is available as downloadable artifact in GitHub Actions after
 the CI builds your PR.
@@ -69,6 +70,7 @@
     'navbar_links': [
         {'href': '/docs/', 'text': 'Documentation'}
     ]
+}
 ```
 
 (This is the default)
diff --git a/sphinx_airflow_theme/setup.py b/sphinx_airflow_theme/setup.py
index 2a15968..c4f787a 100644
--- a/sphinx_airflow_theme/setup.py
+++ b/sphinx_airflow_theme/setup.py
@@ -38,7 +38,7 @@
 
 setup(
     name='sphinx_airflow_theme',
-    version='0.0.2',
+    version='0.0.4',
     url='https://github.com/apache/airflow-site/tree/aip-11',
     license='Apache License 2.0',
     author='Apache Software Foundation',