fix(ci): bump Zig 0.13.0 → 0.15.2 (Burrito 1.5.0 baseline) (#79)

v0.4.3 build hit:
  > Your Zig version does not match the one Burrito requires!
  > We need 0.15.2, you have: 0.13.0

Burrito 1.5.0 pins to Zig 0.15.2 (recent — Zig 0.15 released
late 2025). My earlier 0.13.0 pick was based on stale info.

This is the 4th and hopefully final layer of the OSA CI bug
chain:
  v0.4.0: --target flag invalid (PR #75)
  v0.4.1: zig+xz not in PATH (PR #78 added zig)
  v0.4.2: OTP 27 Mix bugs (PRs #76 + #77 pin to OTP 26)
  v0.4.3: wrong Zig version (this PR pins to 0.15.2)

Tag v0.4.4 after merge.

Author: robertohluna

.github/workflows/release.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Install Zig (Burrito pre_check requires zig on PATH)
         uses: mlugg/setup-zig@v1
         with:
-          version: 0.13.0
+          version: 0.15.2
 
       - name: Build Burrito binary (macos_arm64)
         run: mix release burrito
@@ -99,7 +99,7 @@ jobs:
       - name: Install Zig (Burrito pre_check requires zig on PATH)
         uses: mlugg/setup-zig@v1
         with:
-          version: 0.13.0
+          version: 0.15.2
 
       - name: Build Burrito binary (linux_amd64)
         run: mix release burrito
@@ -141,7 +141,7 @@ jobs:
       - name: Install Zig (Burrito pre_check requires zig on PATH)
         uses: mlugg/setup-zig@v1
         with:
-          version: 0.13.0
+          version: 0.15.2
 
       - name: Build Burrito binary (linux_arm64)
         run: mix release burrito