Add missing immediate_address_space WGSL language feature (#590)

Spec PR: https://github.com/gpuweb/gpuweb/pull/6276

webgpu.h

diff --git a/webgpu.h b/webgpu.h
index 289fd6b..73a3e0e 100644
--- a/webgpu.h
+++ b/webgpu.h
@@ -1252,6 +1252,7 @@
     WGPUWGSLLanguageFeatureName_SubgroupUniformity = 0x00000008,
     WGPUWGSLLanguageFeatureName_TextureFormatsTier1 = 0x00000009,
     WGPUWGSLLanguageFeatureName_LinearIndexing = 0x0000000A,
+    WGPUWGSLLanguageFeatureName_ImmediateAddressSpace = 0x0000000B,
     WGPUWGSLLanguageFeatureName_Force32 = 0x7FFFFFFF
 } WGPUWGSLLanguageFeatureName WGPU_ENUM_ATTRIBUTE;
 

webgpu.json

diff --git a/webgpu.json b/webgpu.json
index 31d6db3..26c7750 100644
--- a/webgpu.json
+++ b/webgpu.json
@@ -2425,6 +2425,10 @@
         {
           "doc": "TODO\n",
           "name": "linear_indexing"
+        },
+        {
+          "doc": "TODO\n",
+          "name": "immediate_address_space"
         }
       ],
       "name": "WGSL_language_feature_name"

webgpu.yml

diff --git a/webgpu.yml b/webgpu.yml
index 8da7807..7af5f8b 100644
--- a/webgpu.yml
+++ b/webgpu.yml
@@ -1531,6 +1531,9 @@
       - name: linear_indexing
         doc: |
           TODO
+      - name: immediate_address_space
+        doc: |
+          TODO
 bitflags:
   - name: buffer_usage
     doc: |