fix release.yml: pin bun-version literally so the workflow pin test passes

The release workflow hoisted bun-version into an env var, but test/cli.test.ts asserts
both workflows carry the literal 'bun-version: 1.3.14' pin. Revert the indirection - the
pin is the point.

.github/workflows/release.yml

@@ -17,9 +17,6 @@ concurrency:
 permissions:
   contents: write
 
-env:
-  BUN_VERSION: 1.3.14
-
 jobs:
   verify:
     runs-on: ubuntu-latest
@@ -27,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: ${{ env.BUN_VERSION }}
+          bun-version: 1.3.14
       - name: Cache the bun install store
         uses: actions/cache@v4
         with:
@@ -46,7 +43,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: ${{ env.BUN_VERSION }}
+          bun-version: 1.3.14
       - name: Cache the bun install store
         uses: actions/cache@v4
         with: