tdf#70979 make conference proceedings strings unique

Change-Id: I8386651390ba753108577ced29050585b72c5e78
Reviewed-on: https://gerrit.libreoffice.org/28813Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Yousuf Philips <philipz85@hotmail.com>

extensions/source/bibliography/sections.src

@@ -37,7 +37,7 @@ String ST_TYPE_BOOKLET
 };
 String ST_TYPE_CONFERENCE
 {
-    Text [ en-US ] = "Conference proceedings";
+    Text [ en-US ] = "Conference proceedings article (BiBTeX)";
 };
 String ST_TYPE_INBOOK
 {
@@ -49,7 +49,7 @@ String ST_TYPE_INCOLLECTION
 };
 String ST_TYPE_INPROCEEDINGS
 {
-    Text [ en-US ] = "Conference proceedings";
+    Text [ en-US ] = "Conference proceedings article";
 };
 String ST_TYPE_JOURNAL
 {