Update node in 8.0 webassembly image

Still trying to unblock dotnet/runtime#110199

Author: akoeplinger

src/azurelinux/3.0/net8.0/webassembly/amd64/Dockerfile

@@ -20,22 +20,22 @@ RUN npm i -g typescript
 ENV EMSCRIPTEN_VERSION=3.1.34
 ENV EMSCRIPTEN_PATH=/usr/local/emscripten
 ENV EMSDK_PATH=/usr/local/emscripten/emsdk
-ENV NODE_VERSION_IN_EMSDK=15.14.0_64bit
+ENV NODE_VERSION_IN_EMSDK=16.20.0_64bit
 
 RUN mkdir ${EMSCRIPTEN_PATH} \
     && cd ${EMSCRIPTEN_PATH} \
     && git clone https://github.com/emscripten-core/emsdk.git ${EMSDK_PATH} \
     && cd ${EMSDK_PATH} \
     && git checkout ${EMSCRIPTEN_VERSION} \
     # patch node version in emsdk_manifest.json
-    && sed -i 's/14\.18\.2/15\.14\.0/g' emsdk_manifest.json \
+    && sed -i 's/14\.18\.2/16\.20\.0/g' emsdk_manifest.json \
     && ./emsdk install ${EMSCRIPTEN_VERSION}-upstream \
     && ./emsdk activate ${EMSCRIPTEN_VERSION}-upstream \
     && chmod -R 777 ${EMSCRIPTEN_PATH} \
     # update packages to non-vulnerable versions
     && export PATH=$PATH:${EMSDK_PATH}/node/${NODE_VERSION_IN_EMSDK}/bin \
     && cd ${EMSDK_PATH}/node/${NODE_VERSION_IN_EMSDK}/lib \
-    && npm install npm@8 \
+    && npm install npm@9 \
     && npm prune --production \
     && cd ${EMSDK_PATH}/upstream/emscripten \
     && jq 'del(.devDependencies)' package.json > package.json.tmp && mv package.json.tmp package.json \