fix: do not replace group of dashes with a single dash

.github/workflows/slugify-value.yaml

@@ -1,5 +1,9 @@
 name: Slugify Value
-on: [push]
+on:
+  push:
+    branches:
+      - v1.x
+  pull_request:
 jobs:
   os-testing:
     strategy:

slugify.sh

@@ -28,12 +28,12 @@ else
 fi
 
 slug() {
-  output=$(sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9._]+/-/g;s/-+/-/g;s/^-*//;s/-*$//' <<<"$1")
+  output=$(sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9._-]+/-/g;s/-+/-/g;s/^-*//;s/-*$//' <<<"$1")
   reduce "$output"
 }
 
 slug_url() {
-  output=$(sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9_]+/-/g;s/-+/-/g;s/^-*//;s/-*$//' <<<"$1")
+  output=$(sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9_-]+/-/g;s/-+/-/g;s/^-*//;s/-*$//' <<<"$1")
   reduce "$output"
 }