Fix 'occured' -> 'occurred' typo in JGitEnvironmentRepository clone-error log

The error message in JGitEnvironmentRepository.java read 'An error occured trying to clone'. Fixed to 'occurred'. Log-message-only change.

Signed-off-by: Sai Asish Y <say.apm35@gmail.com>

Author: SAY-5

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/JGitEnvironmentRepository.java

@@ -676,7 +676,7 @@ private Git cloneToBasedir() throws GitAPIException {
 			return clone.call();
 		}
 		catch (GitAPIException e) {
-			this.logger.warn("Error occured cloning to base directory.", e);
+			this.logger.warn("Error occurred cloning to base directory.", e);
 			deleteBaseDirIfExists();
 			throw e;
 		}