temporarily use branch as base

Author: adinauer

.github/workflows/update-spring-boot-versions.yml

@@ -295,7 +295,7 @@ jobs:
         uses: peter-evans/create-pull-request@v7
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          base: main
+          base: feat/spring-boot-matrix-auto-update
           commit-message: "chore: Update Spring Boot version matrices"
           title: "Automated Spring Boot Version Update"
           body: |