Fix grammar in FAQ

Author: nhooyr

ci/build/clean.sh

@@ -11,7 +11,7 @@ main() {
     release-static \
     release-packages \
     release-gcp \
-    release-images/
+    release-images/ \
     dist \
     .tsbuildinfo \
     .cache/out.tsbuildinfo

doc/FAQ.md

@@ -16,7 +16,7 @@
 - [How can I disable telemetry?](#how-can-i-disable-telemetry)
 - [How does code-server decide what workspace or folder to open?](#how-does-code-server-decide-what-workspace-or-folder-to-open)
 - [How do I debug issues with code-server?](#how-do-i-debug-issues-with-code-server)
-- [Heartbeat file](#heartbeat-file)
+- [Heartbeat File](#heartbeat-file)
 - [How does the config file work?](#how-does-the-config-file-work)
 - [Enterprise](#enterprise)
 
@@ -198,7 +198,7 @@ information from the following places:
 Additionally, collecting core dumps (you may need to enable them first) if
 code-server crashes can be helpful.
 
-## Heartbeat file
+## Heartbeat File
 
 `code-server` touches `~/.local/share/code-server/heartbeat` once a minute as long
 as there is an active browser connection.