Replace buildenv image with a container reference

.gitea/workflows/build.yml

@@ -9,13 +9,13 @@ on:
 
 jobs:
   audit:
-    runs-on: buildenv
+    container: buildenv:5
     steps:
       - uses: actions/checkout@v4
       - run: hlint -- src tests
 
   test:
-    runs-on: buildenv
+    container: buildenv:5
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies
@@ -25,7 +25,7 @@ jobs:
       - run: cabal test --test-show-details=streaming
 
   doc:
-    runs-on: buildenv
+    container: buildenv:5
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies

.gitea/workflows/release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   release:
-    runs-on: buildenv
+    container: buildenv:5
     steps:
       - uses: actions/checkout@v4
       - name: Upload a candidate

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on
 and this project adheres to
 [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [Unreleased]
+
 ## [1.0.7.0] - 2026-01-25
 ### Removed
 - Deprecated `Language.GraphQL.Class.gql` (moved to `Language.GraphQL.TH`).
@@ -53,6 +55,7 @@ and this project adheres to
 - JSON serialization.
 - Test helpers.
 
+[Unreleased]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.7.0...master
 [1.0.7.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.6.0...v1.0.7.0
 [1.0.6.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.5.0...v1.0.6.0
 [1.0.5.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.4.0...v1.0.5.0