Bump mymindstorm/setup-emsdk from 14 to 15 in the github-actions group

Bumps the github-actions group with 1 update: [mymindstorm/setup-emsdk](https://github.com/mymindstorm/setup-emsdk).


Updates `mymindstorm/setup-emsdk` from 14 to 15
- [Release notes](https://github.com/mymindstorm/setup-emsdk/releases)
- [Commits](emscripten-core/setup-emsdk@6ab9eb1...667eb33)

---
updated-dependencies:
- dependency-name: mymindstorm/setup-emsdk
  dependency-version: '15'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/emscripten.yml

@@ -6,7 +6,7 @@ jobs:
     steps:
       - uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98 # v4.2.2
       - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
-      - uses: mymindstorm/setup-emsdk@6ab9eb1bda2574c4ddb79809fc9247783eaf9021 # v14
+      - uses: mymindstorm/setup-emsdk@667eb33f24e84e7f362c16d8d7fff0629a73e15e # v15
       - name: Verify
         run: emcc -v
       - name: Checkout