fix: upgrade Go to 1.25.6 and fix docs build errors

This commit fixes the failing CI and Deploy Docs workflows:

1. **Security vulnerabilities fixed**:
 - Upgraded Go from 1.25.5 to 1.25.6 in all GitHub workflows
 - Upgraded go.mod to use Go 1.25.6
 - Fixes GO-2026-4341 (net/url vulnerability)
 - Fixes GO-2026-4340 (crypto/tls vulnerability)

2. **Docs build errors fixed**:
 - Removed non-existent 'reference' slug from Astro sidebar config
 - Fixed MDX curly brace escaping issues ({app} → `{app}`)
 - Applied fix to github.mdx, index.mdx, and settings.mdx

All fixes verified by successful docs build (88 pages built).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: ndbroadbent

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.25.6"
 
       - name: Install libfido2 dependencies
         run: |
@@ -63,7 +63,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.25.6"
 
       - name: Cache golangci-lint cache
         uses: actions/cache@v4

.github/workflows/e2e.yml

@@ -157,7 +157,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.25.6"
 
       - name: Download gateway image
         uses: actions/download-artifact@v4

.github/workflows/release.yml

@@ -77,7 +77,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25.5"
+          go-version: "1.25.6"
       - name: Build binary
         env:
           CGO_ENABLED: 0

docs/astro.config.mjs

@@ -280,7 +280,6 @@ export default defineConfig({
         {
           label: 'Reference',
           items: [
-            { label: 'Overview', slug: 'reference' },
             { label: 'CLI Commands', slug: 'reference/cli-commands' },
             {
               label: 'Environment Variables',

docs/src/content/docs/integrations/deploy-approvals/github.mdx

@@ -51,7 +51,7 @@ The token needs permissions to read branches/commits and post PR comments:
 
 ### Per-App Settings
 
-These settings live under **Apps → {app} → Settings**:
+These settings live under **Apps → `{app}` → Settings**:
 
 | Setting | Description | Example |
 |---------|-------------|---------|

docs/src/content/docs/user-guide/web-ui/index.mdx

@@ -70,7 +70,7 @@ Non-admins can browse most read-only views, but only admins can change users, in
 
 ## App Settings
 
-App-level settings live under **Apps → {app} → Settings**. This is where admins configure:
+App-level settings live under **Apps → `{app}` → Settings**. This is where admins configure:
 
 - VCS/CI integration per app (GitHub + CircleCI)
 - Protected and secret environment variables

docs/src/content/docs/user-guide/web-ui/settings.mdx

@@ -52,7 +52,7 @@ These defaults are used when an app does not specify its own provider settings.
 
 ## App Settings (Per-App)
 
-App-specific settings are **not** on this page. Go to **Apps → {app} → Settings** to configure:
+App-specific settings are **not** on this page. Go to **Apps → `{app}` → Settings** to configure:
 
 - VCS/CI deploy settings (repo, branch, approval job name)
 - Protected and secret environment variables

go.mod

@@ -1,6 +1,6 @@
 module github.com/DocSpring/rack-gateway
 
-go 1.25.0
+go 1.25.6
 
 require (
 	github.com/GeertJohan/yubigo v0.0.0-20190917122436-175bc097e60e