Add WASM build for .NET 9.

.github/workflows/build.yml

@@ -115,6 +115,7 @@ jobs:
         - '{ "tfm": "net6.0", "emsdk": "2.0.23" }' # eol: 2024-11-12
         - '{ "tfm": "net7.0", "emsdk": "3.1.12" }' # eol: 2024-05-14
         - '{ "tfm": "net8.0", "emsdk": "3.1.34" }' # eol: 2026-11-14
+        - '{ "tfm": "net9.0", "emsdk": "3.1.56" }' # eol: 2026-05-12
     runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v4
@@ -204,6 +205,10 @@ jobs:
       with:
         name: bin-wasm-net8.0
         path: cb/bld/bin
+    - uses: actions/download-artifact@v4
+      with:
+        name: bin-wasm-net9.0
+        path: cb/bld/bin
     # note that the following is mostly a copy of the build script from the SQLitePCL.raw repo
     - name: "Set up Java: 11"
       uses: actions/setup-java@v1
@@ -261,6 +266,10 @@ jobs:
       with:
         name: bin-wasm-net8.0
         path: bld/bin
+    - uses: actions/download-artifact@v4
+      with:
+        name: bin-wasm-net9.0
+        path: bld/bin
     - name: Fix permissions
       run: |
         find ./bld/bin/e_sqlite3 -name *.so | xargs chmod 0775