travis build: fix escaping of double quotes

closes #324

Cherry-picked 536280bb9810166651cfd2dc3e6a24b0bc0e2161

.travis/release.sh

@@ -18,7 +18,7 @@ RELEASE_BODY=$(tail -n +3 src/site/markdown/overview/changelog.md) # skips the f
 RELEASE_BODY="${RELEASE_BODY//$'\\'/\\\\}"
 RELEASE_BODY="${RELEASE_BODY//$'\r'/}"
 RELEASE_BODY="${RELEASE_BODY//$'\n'/\\r\\n}"
-RELEASE_BODY="${RELEASE_BODY//$'"'/\\$'"'}"
+RELEASE_BODY="${RELEASE_BODY//'"'/\\\"}"
 cat > release-edit-request.json <<EOF
 {
   "name": "$RELEASE_NAME",

src/site/markdown/overview/changelog.md

@@ -17,6 +17,10 @@ This is a bug fixing release.
 
 ### Fixed Issues
 
+*   General
+    *   [#324](https://github.com/pmd/pmd/issues/324): \[core] Automated release - github release notes missing
+
+
 ### API Changes
 
 ### External Contributions