fix: replace invalid <p> wrapping Button with <div> (#768)

* fix: replace invalid <p> wrapping Button with <div>

The Button component renders a <div> in its primary variant. HTML
disallows block elements inside <p>, so browsers auto-close the <p>
during parsing and React 19 reports a hydration mismatch. The
float="center" attribute was non-functional, so rendering is unchanged.

* chore: gitignore .playwright-mcp run artifacts

src/pages/get-started/install/opnsense.mdx

@@ -139,9 +139,9 @@ By default, OPNsense uses automatic outbound NAT which randomizes source ports.
     -   Run `netbird status -d` to verify the connection.
 
 ## Get started
-<p float="center" >
+<div>
     <Button name="button" className="button-5" onClick={() => window.open("https://netbird.io/pricing")}>Use NetBird</Button>
-</p>
+</div>
 
 - Make sure to [star us on GitHub](https://github.com/netbirdio/netbird)
 - Follow us [on X](https://x.com/netbird)

src/pages/get-started/install/pfsense.mdx

@@ -158,9 +158,9 @@ pkg delete netbird pfSense-pkg-NetBird
 
 
 ## Get started
-<p float="center" >
+<div>
     <Button name="button" className="button-5" onClick={() => window.open("https://netbird.io/pricing")}>Use NetBird</Button>
-</p>
+</div>
 
 - Make sure to [star us on GitHub](https://github.com/netbirdio/netbird)
 - Follow us [on X](https://x.com/netbird)