[WIP] [CI] DO NOT MERGE - Test pinned version

Author: jerboaa

.github/workflows/mandrel.yml

@@ -29,13 +29,13 @@ concurrency:
 jobs:
   q-main-ea:
     name: "Q main M 25.0 EA"
-    uses: graalvm/mandrel/.github/workflows/base.yml@default
+    uses: jerboaa/graal/.github/workflows/base.yml@support_jdk_pin
     with:
       quarkus-version: "main"
       mandrel-repo: ${{ github.repository }}
       mandrel-version: ${{ github.ref }}
       mandrel-packaging-version: "25.0"
-      jdk: "25/ea"
+      jdk: "pinnedversion:jdk-25.0.3%2B2-ea-beta"
   q-main-ea-win:
     name: "Q main M 25.0 windows EA"
     uses: graalvm/mandrel/.github/workflows/base-windows.yml@default