fix: add top-level env section with VERSION

Author: thpierce

.github/workflows/post_release_version_bump.yml

@@ -8,6 +8,10 @@ on:
         required: true
 
 permissions:
+
+env:
+  VERSION: ${{ github.event.inputs.version }}
+
   contents: write
   pull-requests: write
 

.github/workflows/pre_release_prepare.yml

@@ -12,6 +12,10 @@ on:
         default: 'false'
 
 permissions:
+
+env:
+  VERSION: ${{ github.event.inputs.version }}
+
   contents: write
   pull-requests: write