docs: sentence-case 4 stray Title Case headings

docs/plugins/google-meet.md

@@ -1259,7 +1259,7 @@ a session ended.
 }
 ```
 
-## Agent And Bidi Modes
+## Agent and bidi modes
 
 Chrome `agent` mode is optimized for "my agent is in the meeting" behavior. The
 realtime transcription provider hears the meeting audio, final participant

docs/plugins/sdk-runtime.md

@@ -25,7 +25,7 @@ register(api) {
 }
 ```
 
-## Config Loading And Writes
+## Config loading and writes
 
 Prefer config that was already passed into the active call path, for example `api.config` during registration or a `cfg` argument on channel/provider callbacks. This keeps one process snapshot flowing through the work instead of reparsing config on hot paths.
 

docs/security/network-proxy.md

@@ -118,7 +118,7 @@ Configure the proxy to:
 - Log destination, decision, status, and reason without logging request bodies, authorization headers, cookies, or other secrets.
 - Keep proxy policy under version control and review changes like security-sensitive configuration.
 
-## Recommended Blocked Destinations
+## Recommended blocked destinations
 
 Use this denylist as the starting point for any forward proxy, firewall, or egress policy.
 

docs/tools/web-fetch.md

@@ -143,7 +143,7 @@ Current runtime behavior:
 - If Readability is disabled, `web_fetch` skips straight to the selected
   provider fallback. If no provider is available, it fails closed.
 
-## Trusted Env Proxy
+## Trusted env proxy
 
 If your deployment requires `web_fetch` to go through a trusted outbound
 HTTP(S) proxy, set `tools.web.fetch.useTrustedEnvProxy: true`.