Update build.yaml for Tchap

Author: MatMaul

.github/workflows/build.yaml

@@ -3,8 +3,9 @@ name: Build
 on:
   push:
     branches:
-      - main
+      - main_tchap
       - "release/**"
+      - "test/**"
     tags:
       - "v*"
 
@@ -22,8 +23,8 @@ env:
   CARGO_NET_GIT_FETCH_WITH_CLI: "true"
   SCCACHE_GHA_ENABLED: "true"
   RUSTC_WRAPPER: "sccache"
-  IMAGE: ghcr.io/element-hq/matrix-authentication-service
-  BUILDCACHE: ghcr.io/element-hq/matrix-authentication-service/buildcache
+  IMAGE: ghcr.io/tchapgouv/matrix-authentication-service
+  BUILDCACHE: ghcr.io/tchapgouv/matrix-authentication-service/buildcache
   DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
 
 jobs:
@@ -295,7 +296,7 @@ jobs:
         # Only sign on tags and on commits on main branch
         if: |
           github.event_name != 'pull_request'
-          && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
+          && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main_tchap')
 
         env:
           REGULAR_DIGEST: ${{ steps.output.outputs.metadata && fromJSON(steps.output.outputs.metadata).regular.digest }}
@@ -359,7 +360,7 @@ jobs:
 
   unstable:
     name: Update the unstable release
-    if: github.ref == 'refs/heads/main'
+    if: github.ref == 'refs/heads/main_tchap'
     runs-on: ubuntu-24.04
 
     needs: