chore: add Xcode setup to iOS build workflows

- Introduced Xcode setup step in both iOS build workflows to specify version 16.4 using the maxim-lobanov/setup-xcode action.

Author: patrickkabwe

.github/workflows/ios-build.yml

@@ -50,6 +50,11 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
 
+      - name: Setup Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: 16.4
+
       - name: Install npm dependencies (bun)
         run: bun install
 
@@ -93,6 +98,11 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
 
+      - name: Setup Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+            xcode-version: 16.4
+
       - name: Install npm dependencies (bun)
         run: bun install