Bump sortablejs from 1.15.5 to 1.15.6

Bumps [sortablejs](https://github.com/SortableJS/Sortable) from 1.15.5 to 1.15.6.
- [Release notes](https://github.com/SortableJS/Sortable/releases)
- [Commits](SortableJS/Sortable@1.15.5...1.15.6)

---
updated-dependencies:
- dependency-name: sortablejs
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -54,7 +54,7 @@
     "postcss-cli": "^11.0.0",
     "postcss-flexbugs-fixes": "^5.0.2",
     "postcss-import": "^16.1.0",
-    "sortablejs": "^1.15.5",
+    "sortablejs": "^1.15.6",
     "postcss-preset-env": "^10.1.1",
     "tailwindcss": "^3.4.16",
     "trix": "^2.1.8",

yarn.lock

@@ -2097,10 +2097,10 @@ slash@^5.0.0, slash@^5.1.0:
   resolved "https://registry.yarnpkg.com/slash/-/slash-5.1.0.tgz#be3adddcdf09ac38eebe8dcdc7b1a57a75b095ce"
   integrity sha512-ZA6oR3T/pEyuqwMgAKT0/hAv8oAXckzbkmR0UkUosQ+Mc4RxGoJkRmwHgHufaenlyAgE1Mxgpdcrf75y6XcnDg==
 
-sortablejs@^1.15.5:
-  version "1.15.5"
-  resolved "https://registry.yarnpkg.com/sortablejs/-/sortablejs-1.15.5.tgz#225edc6ae153b2e5eca54f150abc2bc5f9305b29"
-  integrity sha512-xDJLosRJzZ+nVnjaUYmO9H/wZth0lWTRq7VzV1eQyDSKsvxmoJ69HTGcwnwGYpJG/AkJ9OWiwWH4BhIycdonWw==
+sortablejs@^1.15.6:
+  version "1.15.6"
+  resolved "https://registry.yarnpkg.com/sortablejs/-/sortablejs-1.15.6.tgz#ff93699493f5b8ab8d828f933227b4988df1d393"
+  integrity sha512-aNfiuwMEpfBM/CN6LY0ibyhxPfPbyFeBTYJKCvzkJ2GkUpazIt3H+QIPAMHwqQ7tMKaHz1Qj+rJJCqljnf4p3A==
 
 source-map-js@^1.2.1:
   version "1.2.1"