Fix: [Actions] changelog assumed major.minor.patch versioning (#9482)

We now use major.minor versioning, so it failed to pick up the
correct information.

.github/changelog.sh

@@ -4,9 +4,9 @@ tag=$(git name-rev --name-only --tags --no-undefined HEAD 2>/dev/null | sed 's@\
 
 # If we are a tag, show the part of the changelog till (but excluding) the last stable
 if [ -n "$tag" ]; then
-    grep='^[0-9]\+\.[0-9]\+\.[0-9]\+[^-]'
+    grep='^[0-9]\+\.[0-9]\+[^-]'
     next=$(cat changelog.txt | grep '^[0-9]' | awk 'BEGIN { show="false" } // { if (show=="true") print $0; if ($1=="'$tag'") show="true"} ' | grep "$grep" | head -n1 | sed 's/ .*//')
-    cat changelog.txt | awk 'BEGIN { show="false" } /^[0-9]+.[0-9]+.[0-9]+/ { if ($1=="'$next'") show="false"; if ($1=="'$tag'") show="true";} // { if (show=="true") print $0 }'
+    cat changelog.txt | awk 'BEGIN { show="false" } /^[0-9]+.[0-9]+/ { if ($1=="'$next'") show="false"; if ($1=="'$tag'") show="true";} // { if (show=="true") print $0 }'
     exit 0
 fi