fix description link

I didn't test this because I don't have the environment configured but I think that this does not need that though.
The thing is taht I have this in my console
```<a href=https://bitbucket.org/org_duimmyy/projectdummy/pull-request/39>#39 PROJECT-1368</a>```

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/java/bitbucketpullrequestbuilder/bitbucketpullrequestbuilder/BitbucketCause.java b/src/main/java/bitbucketpullrequestbuilder/bitbucketpullrequestbuilder/BitbucketCause.java
index 4745f15..29ef21f 100644
--- a/src/main/java/bitbucketpullrequestbuilder/bitbucketpullrequestbuilder/BitbucketCause.java
+++ b/src/main/java/bitbucketpullrequestbuilder/bitbucketpullrequestbuilder/BitbucketCause.java
@@ -83,9 +83,9 @@ public class BitbucketCause extends Cause {
 
     @Override
     public String getShortDescription() {
-        String description = "<a href=" + BITBUCKET_URL + this.getDestinationRepositoryOwner() + "/";
+        String description = '<a href="' + BITBUCKET_URL + this.getDestinationRepositoryOwner() + "/";
         description += this.getDestinationRepositoryName() + "/pull-request/" + this.getPullRequestId();
-        description += ">#" + this.getPullRequestId() + " " + this.getPullRequestTitle() + "</a>";
+        description += '">#' + this.getPullRequestId() + " " + this.getPullRequestTitle() + "</a>";
         return description;
     }
 }