set shell for windows scripts

Author: jlogan03

.github/workflows/release-python.yml

@@ -167,6 +167,7 @@ jobs:
         run: choco install llvm --version="21.1.0" -y
 
       - name: Clear profiles
+        shell: bash
         run: rm -rf ./scripts/pgo-profiles; mkdir ./scripts/pgo-profiles; mkdir ./scripts/pgo-profiles/pgo.profraw
 
       - name: Instrumented build
@@ -176,6 +177,7 @@ jobs:
           args: --release --out dist --verbose -- "-Cprofile-generate=${PWD}/scripts/pgo-profiles/pgo.profraw"
 
       - name: Install instrumented
+        shell: bash
         run: |
           # Need recent pip for dep groups
           python -m pip install -U pip
@@ -192,6 +194,7 @@ jobs:
           done
 
       - name: Instrumented profile workload
+        shell: bash
         run: |
           # Run profile workload
           LLVM_PROFILE_FILE=scripts/pgo-profiles/pgo.profraw/pgo-%p-%m.profraw python ./scripts/profile_workload.py