feat(advocacy): add Our Advocacy page and nav entry

New page at /us/advocacy/ listing Federal Register
filings. Added to About Us submenu in navigation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jaw-sh

config.toml

@@ -31,6 +31,7 @@ menu = [
         "desktop",
         "footer",
     ], submenu = [
+        { url = "/us/advocacy", name = "Our Advocacy" },
         { url = "/us/board", name = "Board of Directors" },
         { url = "/us/contact", name = "Contact Us" },
         { url = "/us/subscribe", name = "Newsletter" },

content/us/advocacy.md

@@ -0,0 +1,8 @@
++++
+title = "Our Advocacy"
+template = "advocacy.html"
+date = 2026-02-26
+description = "Federal Register comments and public filings submitted by USIPS."
++++
+
+USIPS participates in the federal rulemaking process by submitting public comments on proposed regulations that affect digital rights, financial access, and Internet freedom.