ci/release: disable broken aarch64 cross-compile + don't block release on partial matrix failure

The aarch64 leg currently fails on the ubuntu-22.04 runner because
ports.ubuntu.com's libsystemd0:arm64 needs a libcap2:arm64 that
isn't installable from the sources we list (missing security
pocket + the sed that strips amd64 from the main sources.list
doesn't cover sources.list.d). Disable that leg until someone has
time to actually fix it instead of letting it block every release.

Also: `release` job now uses `if: always() && !cancelled()` so a
single failed build matrix entry doesn't skip publishing the
artifacts that did succeed (Linux x86_64, Windows x86_64, macOS).

Made-with: Cursor

Author: huaying

.github/workflows/release.yml

@@ -29,13 +29,13 @@ jobs:
             build_server: true
             build_client: true
 
-          # Linux aarch64 (cross-compiled — for AWS Graviton, Ampere, etc.)
-          - target: aarch64-unknown-linux-gnu
-            os: ubuntu-22.04
-            suffix: linux-aarch64
-            build_server: true
-            build_client: true
-            cross: true
+          # Linux aarch64 cross-compile is temporarily disabled — the
+          # ports.ubuntu.com arm64 sources have an unresolvable
+          # libsystemd0:arm64 -> libcap2:arm64 dependency on the
+          # current ubuntu-22.04 runner image. Re-enable after pinning
+          # a working sources list (likely needs the security pocket
+          # and an arm64-only sources.list.d entry instead of editing
+          # the main sources.list).
 
           # macOS ARM (client only — server needs X11/DXGI for capture)
           - target: aarch64-apple-darwin
@@ -189,6 +189,10 @@ jobs:
 
   release:
     needs: [build]
+    # Don't let a single matrix-leg failure (e.g. flaky cross-compile)
+    # block publishing the rest of the artifacts. download-artifact will
+    # only pull the legs that actually uploaded.
+    if: always() && !cancelled()
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4