Fix typo

Closes gh-3403

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -580,7 +580,7 @@ content into your application; rather pick only the properties that you need.
     spring.devtools.restart.enabled=true # enable automatic restart
     spring.devtools.restart.exclude= # patterns that should be excluding for triggering a full restart
     spring.devtools.restart.poll-interval= # amount of time (in milliseconds) to wait between polling for classpath changes
-    spring.devtools.restart.quiet-period= # amount of quiet time (in milliseconds) requited without any classpath changes before a restart is triggered
+    spring.devtools.restart.quiet-period= # amount of quiet time (in milliseconds) required without any classpath changes before a restart is triggered
     spring.devtools.restart.trigger-file= # name of a specific file that when changed will trigger the restart
 	spring.devtools.livereload.enabled=true # enable a livereload.com compatible server
     spring.devtools.livereload.port=35729 # server port.

spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -446,7 +446,7 @@ typically in `application.properties` or `application.yml`. For example:
 	server.port=8443
 	server.ssl.key-store=classpath:keystore.jks
 	server.ssl.key-store-password=secret
-	server.ssl.key-password another-secret
+	server.ssl.key-password=another-secret
 ----
 
 See {sc-spring-boot}/context/embedded/Ssl.{sc-ext}[`Ssl`] for details of all of the

spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -872,7 +872,7 @@ The following system metrics are exposed by Spring Boot:
 * The application context uptime in milliseconds (`instance.uptime`)
 * The average system load (`systemload.average`)
 * Heap information in KB (`heap`, `heap.committed`, `heap.init`, `heap.used`)
-* Thread information (`threads`, `thread.peak`, `thead.daemon`)
+* Thread information (`threads`, `thread.peak`, `thread.daemon`)
 * Class load information (`classes`, `classes.loaded`, `classes.unloaded`)
 * Garbage collection information (`gc.xxx.count`, `gc.xxx.time`)