Fix naming in Wasm Swift SDK workflow (#3423)

"SDK" and "Swift SDK" are different concepts, compare `swift build
--help | grep sdk` output, where we have separate CLI options for these
with different meaning:
* SDK is used by Clang and Xcode, with Swift Driver also implementing
the `-sdk` flag. There's no specification for how Clang SDKs are
distributed, thus we don't distribute any Wasm SDK as such.
* Swift SDK is purely a SwiftPM feature, which uses artifact bundles for
distribution. We do distribute Swift SDKs for Wasm.

Same for static Linux BTW, so a separate PR is needed to clean up that
confusion for Musl-related CI workflows.

Additionally, Wasm is not an acronym. Per the Wasm spec
https://webassembly.github.io/spec/core/intro/introduction.html#wasm:
> A contraction of “WebAssembly”, not an acronym, hence not using
all-caps.

Author: MaxDesiatov

.github/workflows/wasm_sdk.yml renamed to .github/workflows/wasm_swift_sdk.yml

@@ -1,4 +1,4 @@
-name: WebAssembly SDK
+name: WebAssembly Swift SDK
 
 permissions:
   contents: read
@@ -12,15 +12,15 @@ on:
         default: "{}"
       additional_command_arguments:
         type: string
-        description: "Additional arguments passed to swift build (the WASM SDK will be specified). Defaults to empty."
+        description: "Additional arguments passed to swift build (the Wasm Swift SDK will be specified). Defaults to empty."
         default: ""
 
 jobs:
   construct-matrix:
-    name: Construct WebAssembly SDK matrix
+    name: Construct WebAssembly Swift SDK matrix
     runs-on: ubuntu-latest
     outputs:
-      wasm-sdk-matrix: '${{ steps.generate-matrix.outputs.wasm-sdk-matrix }}'
+      wasm-swift-sdk-matrix: '${{ steps.generate-matrix.outputs.wasm-swift-sdk-matrix }}'
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -39,7 +39,7 @@ jobs:
 
           # Generate matrix with parsed environment variables
           cat >> "$GITHUB_OUTPUT" << EOM
-          wasm-sdk-matrix=$(echo '{
+          wasm-swift-sdk-matrix=$(echo '{
             "config":[
               {
                 "name":"main Jammy",
@@ -56,11 +56,11 @@ jobs:
           }' | jq -c)
           EOM
 
-  wasm-sdk:
-    name: WebAssembly SDK
+  wasm-swift-sdk:
+    name: WebAssembly Swift SDK
     needs: construct-matrix
     # Workaround https://github.com/nektos/act/issues/1875
     uses: apple/swift-nio/.github/workflows/swift_test_matrix.yml@main
     with:
-      name: "WebAssembly SDK"
-      matrix_string: '${{ needs.construct-matrix.outputs.wasm-sdk-matrix }}'
+      name: "WebAssembly Swift SDK"
+      matrix_string: '${{ needs.construct-matrix.outputs.wasm-swift-sdk-matrix }}'