Upgrade emsdk to 3.1.73 ci

Author: mcbarton

.github/workflows/main.yml

@@ -192,23 +192,23 @@ jobs:
         include:
           - name: ubu24
             os: ubuntu-24.04
-            emsdk_ver: "3.1.45"
+            emsdk_ver: "3.1.73"
             micromamba_shell_init: bash
           - name: ubu22
             os: ubuntu-22.04
-            emsdk_ver: "3.1.45"
+            emsdk_ver: "3.1.73"
             micromamba_shell_init: bash
           - name: osx13-x86
             os: macos-13
-            emsdk_ver: "3.1.45"
+            emsdk_ver: "3.1.73"
             micromamba_shell_init: bash
           - name: osx14-arm
             os: macos-14
-            emsdk_ver: "3.1.45"
+            emsdk_ver: "3.1.73"
             micromamba_shell_init: bash
           - name: osx15-arm
             os: macos-15
-            emsdk_ver: "3.1.45"
+            emsdk_ver: "3.1.73"
             micromamba_shell_init: bash
 
     steps: