GHA: Add web build to GDExtension workflow

.github/workflows/gdextension.yml

@@ -85,6 +85,13 @@ jobs:
             arch: universal
             should-build: true
 
+          - name: 🌐 Web (wasm32, release)
+            runner: ubuntu-20.04
+            platform: web
+            target: template_release
+            arch: wasm32
+            should-build: true
+
         exclude:
           - { opts: { should-build: false } }
 
@@ -134,8 +141,8 @@ jobs:
         if: matrix.opts.platform == 'windows' || matrix.opts.platform == 'macos'
         uses: actions/setup-python@v4
         with:
-          python-version: '3.x'
-          architecture: 'x64'
+          python-version: "3.x"
+          architecture: "x64"
 
       - name: Set up scons
         if: matrix.opts.platform == 'windows' || matrix.opts.platform == 'macos'
@@ -168,7 +175,6 @@ jobs:
           echo "---"
           ls -l -R ./demo/
 
-
       - name: Compilation
         shell: bash
         env: