BUGFIX: Fix sed expression

.github/workflows/CI.yml

@@ -314,7 +314,7 @@ jobs:
       - name: Assert release number is exactly like 1.2.3 or 1.2.dev3
         run: |
           our_version=$(python -c "import sphinx_typo3_theme; print(sphinx_typo3_theme.__version__)")
-          validstr=$(echo "$scm_version" | sed -e 's/\(0\|\([1-9][0-9]*\)\)\.\(0\|\([1-9][0-9]*\)\)\.\(0\|\([1-9][0-9]*\)\)/valid/')
+          validstr=$(echo "$our_version" | sed -e 's/\(0\|\([1-9][0-9]*\)\)\.\(0\|\([1-9][0-9]*\)\)\.\(0\|\([1-9][0-9]*\)\)/valid/')
           echo our version:${our_version}: && echo validates to validstr:${validstr}:
           if [ "$validstr" != "valid" ]; then
             echo Invalid version number. Expecting a legal version like