ci: fix release packaging — setup.m → install.m

The release workflow referenced setup.m which doesn't exist.
The entry point is install.m. Also fix install instructions in
the release body.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: HanSur94

.github/workflows/release.yml

@@ -56,7 +56,7 @@ jobs:
           mkdir -p "${DIRNAME}"
 
           # Copy release contents (allowlist — excludes tests/, benchmarks/, docs/, bridge/, private/, .git/)
-          cp setup.m LICENSE README.md CITATION.cff "${DIRNAME}/"
+          cp install.m LICENSE README.md CITATION.cff "${DIRNAME}/"
           cp -r examples "${DIRNAME}/"
 
           # Copy libs, excluding compiled MEX binaries
@@ -81,7 +81,7 @@ jobs:
 
             ## Installation
 
-            Download the archive, extract it, and run `setup` in MATLAB/Octave to add libraries to path and compile MEX accelerators.
+            Download the archive, extract it, and run `install` in MATLAB/Octave to add libraries to path and compile MEX accelerators.
           files: |
             FastSense-${{ steps.version.outputs.VERSION }}.tar.gz
             FastSense-${{ steps.version.outputs.VERSION }}.zip