Use correct command to upgrade pip in dbt nux

Summary:
The previous command did not actually upgrade pip and left us on 20.0.2.

Test Plan:
Go through the NUX with this new YAML, it now correctly backtracks and is able to install the correct set of dependencies.

I'm unclear if I need to do a release of the action for this to be applied or not?

github/serverless/dbt/branch_deployments.yml

@@ -64,7 +64,7 @@ jobs:
         if: steps.prerun.outputs.result == 'pex-deploy'
         # --upgrade-strategy eager picks up newer packages that are required for things to work
         run: |
-          pip install pip --upgrade
+          python -m pip install pip --upgrade
           cd project-repo/${{ env.DAGSTER_PROJECT_NAME }}
           pip install . --upgrade --upgrade-strategy eager
           dagster-dbt project prepare-and-package --file ${{ env.DAGSTER_PROJECT_NAME }}/project.py

github/serverless/dbt/deploy.yml

@@ -64,7 +64,7 @@ jobs:
         if: steps.prerun.outputs.result == 'pex-deploy'
         # --upgrade-strategy eager picks up newer packages that are required for things to work
         run: |
-          pip install pip --upgrade
+          python -m pip install pip --upgrade
           cd project-repo/${{ env.DAGSTER_PROJECT_NAME }}
           pip install . --upgrade --upgrade-strategy eager
           dagster-dbt project prepare-and-package --file ${{ env.DAGSTER_PROJECT_NAME }}/project.py

gitlab/dbt/serverless-ci-dbt.yml

@@ -33,7 +33,7 @@ deploy-branch:
       --author-name "${PR_NAME}"
       --author-email $PR_EMAIL)
     # install dbt package
-    - pip install pip --upgrade
+    - python -m pip install pip --upgrade
     - cd $DAGSTER_DBT_PROJECT_DIR/$DAGSTER_DBT_PROJECT_NAME
     - pip install . MarkupSafe==2.0.1 'click>8.1.0' 'Jinja2>3.0.0'
     - pip install pyOpenSSL --upgrade
@@ -79,7 +79,7 @@ deploy:
   image: ghcr.io/dagster-io/dagster-cloud-action:0.1.43
   script:
     # install dbt package
-    - pip install pip --upgrade
+    - python -m pip install pip --upgrade
     - cd $DAGSTER_DBT_PROJECT_DIR/$DAGSTER_DBT_PROJECT_NAME
     - pip install . MarkupSafe==2.0.1 'click>8.1.0' 'Jinja2>3.0.0'
     - pip install pyOpenSSL --upgrade