FilestoreManager: Fix typo in log message

Change-Id: I9a7f5d865ba21f0371d8800c7fef7a09cbb48640

src/main/java/com/gitblit/manager/FilestoreManager.java

diff --git a/src/main/java/com/gitblit/manager/FilestoreManager.java b/src/main/java/com/gitblit/manager/FilestoreManager.java
index 1110855..38aecbc 100644
--- a/src/main/java/com/gitblit/manager/FilestoreManager.java
+++ b/src/main/java/com/gitblit/manager/FilestoreManager.java
@@ -390,7 +390,7 @@
 		try {
 			return Files.getFileStore(getStorageFolder().toPath()).getUsableSpace();
 		} catch (IOException e) {
-			logger.error(MessageFormat.format("Failed to retrive available space in Filestore {0}", e));
+			logger.error(MessageFormat.format("Failed to retrieve available space in Filestore {0}", e));
 		}
 
 		return UNDEFINED_SIZE;