fix: replace svg with png in readme to fix vsce package error, bump to 3.0.4

Author: hqyyqh

README.md

@@ -1,7 +1,7 @@
 # DynaSense (LS-DYNA Studio)
 
 <div align="center">
-  <img src="images/ls.svg" width="120" height="120" alt="LS-DYNA Icon">
+  <img src="images/LS_DYNA_geo_metro.png" width="120" height="120" alt="LS-DYNA Icon">
   <h3>A Feature-Rich LS-DYNA Editor for VS Code</h3>
   <p>Built for CAE engineers: intelligent autocomplete, large file preview, and auto-alignment.</p>
 

README_zh.md

@@ -1,7 +1,7 @@
 # DynaSense (LS-DYNA Studio)
 
 <div align="center">
-  <img src="images/ls.svg" width="120" height="120" alt="LS-DYNA Icon">
+  <img src="images/LS_DYNA_geo_metro.png" width="120" height="120" alt="LS-DYNA Icon">
   <h3>VS Code 平台功能丰富的 LS-DYNA 工程模型编辑器</h3>
   <p>为 CAE 工程师打造：包含智能补全、大文件预览、以及代码自动对齐等功能。</p>
 

package.json

@@ -11,7 +11,7 @@
         "url": "https://github.com/hqyyqh/vscode-lsdyna"
     },
     "icon": "images/LS_DYNA_geo_metro.png",
-    "version": "3.0.3",
+    "version": "3.0.4",
     "engines": {
         "vscode": "^1.50.0"
     },