Don't bother making elvish-$version available.

The binary name from old archives has an extra "v" before the $version, and it's
a hassle to handle. Just make Elvish available as "elvish".

.github/workflows/test.yml

@@ -21,4 +21,3 @@ jobs:
       run: |
         echo This is Elvish $version
         elvish -c 'echo Can be used as an external command too'
-        elvish-${{ matrix.elvish-version }} -c 'echo Also available with explicit version'

main.mjs

@@ -21,21 +21,17 @@ async function main() {
             Invoke-RestMethod -Uri '${urlBase}.zip' -OutFile elvish.zip
             Expand-Archive elvish.zip -DestinationPath .
             rm elvish.zip
-            if (Test-Path elvish.exe -PathType leaf) {
-              New-Item -ItemType SymbolicLink -Path elvish-${version}.exe -Target elvish.exe
-            } else {
-              New-Item -ItemType SymbolicLink -Path elvish.exe -Target elvish-${version}.exe
+            if (!Test-Path elvish.exe -PathType leaf) {
+              Rename-Item -Path elvish-${version}.exe -NewName elvish.exe
             }
             `);
     } else {
         await run('sh', '-c',
             `
             cd /usr/local/bin
             curl -o- ${urlBase}.tar.gz | tar xz
-            if test -f elvish; then
-              ln -sf elvish elvish-${version}
-            else
-              ln -sf elvish-${version} elvish
+            if ! test -f elvish; then
+              mv elvish-${version} elvish
             fi
             `);
     }