Update buildenv to 6

.gitea/workflows/build.yml

@@ -9,15 +9,15 @@ on:
 
 jobs:
   audit:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: hlint -- src tests
 
   test:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install dependencies
         run: cabal update
       - name: Prepare system
@@ -25,9 +25,9 @@ jobs:
       - run: cabal test --test-show-details=streaming --enable-tests
 
   doc:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install dependencies
         run: cabal update
       - run: cabal haddock --enable-documentation

.gitea/workflows/release.yml

@@ -7,9 +7,9 @@ on:
 
 jobs:
   release:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Upload a candidate
         env:
           HACKAGE_PASSWORD: ${{ secrets.HACKAGE_PASSWORD }}