Fix template literal interpolation in Stackblitz demo links

Replace plain markdown links with Vue dynamic :href bindings so that
$page.buildDateURIEncoded is properly interpolated at render time.
Markdown links compile to static href attributes where ${} syntax
is emitted as literal characters instead of being evaluated.

Author: cursoragent

docs/guide/custom-functions.md

@@ -358,7 +358,7 @@ it('returns a VALUE error if the range argument contains a string', () => {
 
 ## Working demo
 
-Explore the full working example on [Stackblitz](https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/custom-functions?v=${$page.buildDateURIEncoded}).
+Explore the full working example on <a :href="`https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/custom-functions?v=${$page.buildDateURIEncoded}`">Stackblitz</a>.
 
 This demo contains the implementation of both the
 [`GREET`](#add-a-simple-custom-function) and

docs/guide/integration-with-angular.md

@@ -6,4 +6,4 @@ For more details, see the [client-side installation](client-side-installation.md
 
 ## Demo
 
-Explore the full working example on [Stackblitz](https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/angular-demo?v=${$page.buildDateURIEncoded}).
+Explore the full working example on <a :href="`https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/angular-demo?v=${$page.buildDateURIEncoded}`">Stackblitz</a>.

docs/guide/integration-with-react.md

@@ -6,4 +6,4 @@ For more details, see the [client-side installation](client-side-installation.md
 
 ## Demo
 
-Explore the full working example on [Stackblitz](https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/react-demo?v=${$page.buildDateURIEncoded}).
+Explore the full working example on <a :href="`https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/react-demo?v=${$page.buildDateURIEncoded}`">Stackblitz</a>.

docs/guide/integration-with-svelte.md

@@ -6,4 +6,4 @@ For more details, see the [client-side installation](client-side-installation.md
 
 ## Demo
 
-Explore the full working example on [Stackblitz](https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/svelte-demo?v=${$page.buildDateURIEncoded}).
+Explore the full working example on <a :href="`https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/svelte-demo?v=${$page.buildDateURIEncoded}`">Stackblitz</a>.

docs/guide/integration-with-vue.md

@@ -31,7 +31,7 @@ This function prevents Vue from converting the HyperFormula instance into a reac
 
 ## Demo
 
-Explore the full working example on [Stackblitz](https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/vue-3-demo?v=${$page.buildDateURIEncoded}).
+Explore the full working example on <a :href="`https://stackblitz.com/github/handsontable/hyperformula-demos/tree/3.2.x/vue-3-demo?v=${$page.buildDateURIEncoded}`">Stackblitz</a>.
 
 ::: tip
 This demo uses the [Vue 3](https://v3.vuejs.org/) framework. If you are looking for an example using Vue 2, check out the [code on GitHub](https://github.com/handsontable/hyperformula-demos/tree/2.5.x/vue-demo).