fix: skip implicit pixi install before lockfile regeneration (#59)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: vinzenzmay <44975247+vinzenzmay@users.noreply.github.com>

Author: Copilot

.github/workflows/release-please.yml

@@ -39,6 +39,7 @@ jobs:
         uses: prefix-dev/setup-pixi@v0.8.1
         with:
           pixi-version: latest
+          run-install: false
 
       - name: Update lockfile
         if: ${{ steps.release.outputs.pr }}

.github/workflows/update-lockfile.yml

@@ -17,6 +17,7 @@ jobs:
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           pixi-version: latest
+          run-install: false
 
       - name: Update lockfile
         run: |