Update workflows.

Author: io7m

.github/workflows/deploy.linux.temurin.lts.yml

@@ -18,12 +18,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
         with:
           submodules: true
 
       - name: JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00
         with:
           java-version: 23
           distribution: temurin