pin latest botorch release before releasing Ax

Summary: Bump the botorch version per step 3 [here](https://www.internalfb.com/intern/wiki/AE/DeveloperGuide/Open_Source/release/)

Reviewed By: lena-kashtelyan

Differential Revision: D29493329

fbshipit-source-id: ea42cd1ddb9777b1f6ca86c53abd0b7f0800f774

.github/workflows/deploy.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Install dependencies (pinned Botorch)
       run: |
         # TODO: read pinned Botorch version from a shared source
-        pip install botorch==0.4.0
+        pip install botorch==0.5.0
         pip install -e .[dev,mysql,notebook]
       if: matrix.botorch == 'pinned'
     - name: Import Ax

setup.py

@@ -6,7 +6,7 @@
 from setuptools import find_packages, setup
 
 # TODO: read pinned Botorch version from a shared source
-PINNED_BOTORCH_VERSION = "0.4.0"
+PINNED_BOTORCH_VERSION = "0.5.0"
 
 if os.environ.get("ALLOW_BOTORCH_LATEST"):
     # allows installing using a more recent botorch dev version