shell: bash + test conditional with latest

.github/workflows/pyright.yml

@@ -24,7 +24,7 @@ env:
   # pin pyright so a new version doesn't suddenly cause the CI to fail,
   # until types-setuptools is removed from typeshed.
   # For help with static-typing issues, or pyright update, ping @Avasam
-  PYRIGHT_VERSION: "1.1.377"
+  PYRIGHT_VERSION: "latest"
 
   # Environment variable to support color support (jaraco/skeleton#66)
   FORCE_COLOR: 1
@@ -75,12 +75,13 @@ jobs:
           echo 'To run this test locally with npm pre-installed, run:'
           echo '> npx -y pyright@${{ env.PYRIGHT_VERSION }} --threads'
           echo 'You can also instead install "Pyright for Python" which will install npm for you:'
-          if [$PYRIGHT_VERSION == 'latest']; then
+          if ['$PYRIGHT_VERSION' == 'latest']; then
             echo '> pip install -U'
           else
             echo '> pip install pyright==${{ env.PYRIGHT_VERSION }}'
           fi
           echo 'pyright --threads'
+        shell: bash
       - name: Run pyright
         uses: jakebailey/pyright-action@v2
         with: