Fix PyPI release: use explicit manylinux_2_28 for Linux wheels (#36)

PyPI rejected linux_aarch64 wheels because manylinux: auto on native
ARM runners skips Docker, producing non-manylinux platform tags.

Using explicit manylinux_2_28 forces Docker container usage, producing
PyPI-compatible manylinux_2_28_* wheel tags.

Author: madhavajay

.github/workflows/release.yml

@@ -123,13 +123,14 @@ jobs:
         include:
           # Linux builds use manylinux Docker with parent directory mounted
           # for sibling dependencies (../syft-crypto-core, ../syftbox)
+          # Must use explicit manylinux version (not auto) to force Docker usage
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
-            manylinux: auto
+            manylinux: manylinux_2_28
             py-interpreter: "python3.13"
           - os: ubuntu-24.04-arm
             target: aarch64-unknown-linux-gnu
-            manylinux: auto
+            manylinux: manylinux_2_28
             py-interpreter: "python3.13"
           # macOS and Windows build natively
           - os: macos-latest