[dagster-university] update pip install quoting

docs/dagster-university/pages/dagster-dbt/lesson-2/2-set-up-the-dagster-project.md

@@ -51,7 +51,7 @@ Then, run the following in the command line to rename the `.env.example`  file a
 ```bash
 cd dagster-and-dbt
 cp .env.example .env
-pip install -e ".[dev]"
+pip install -e .[dev]
 ```
 
 The `e` flag installs the project in editable mode so you can modify existing Dagster assets without having to reload the code location. This allows you to shorten the time it takes to test a change. However, you’ll need to reload the code location in the Dagster UI when adding new assets or installing additional dependencies.

docs/dagster-university/pages/dagster-essentials/lesson-2/create-dagster-project.md

@@ -23,7 +23,7 @@ Next, set up the default environment variables and install the project’s Pytho
 ```shell
 cd dagster_university
 cp .env.example .env
-pip install -e ".[dev]"
+pip install -e .[dev]
 ```
 
 The `-e` flag installs the project in editable mode, which will improve your development experience by shortening how long it takes to test a change. The main exceptions are when you're adding new assets or installing additional dependencies.

docs/dagster-university/pages/dagster-essentials/lesson-2/requirements-and-installation.md

@@ -32,5 +32,5 @@ pip --version
 To install Dagster into your current Python environment:
 
 ```shell
-pip install 'dagster~=1.9'
+pip install dagster~=1.9
 ```