Rename casablanca patch file

Since there is no difference in patching between 3.0.0 and 3.0.1
release there name of patchfile that includes this tag
is unnecessary and confusing.

Issue-ID: OOM-1687

Change-Id: I751398f15c38dab83e36ed0b8f555533497291f8
Signed-off-by: Milan Verespej <m.verespej@partner.samsung.com>
diff --git a/docs/BuildGuide.rst b/docs/BuildGuide.rst
index 4cf8d97..96c1fbf 100644
--- a/docs/BuildGuide.rst
+++ b/docs/BuildGuide.rst
@@ -296,7 +296,7 @@
 
 For example:
 
-``$ ./build/fetch_and_patch_charts.sh https://gerrit.onap.org/r/oom 3.0.0-ONAP /tmp/offline-installer/patches/casablanca_3.0.0.patch /tmp/oom-clone``
+``$ ./build/fetch_and_patch_charts.sh https://gerrit.onap.org/r/oom 3.0.0-ONAP /tmp/offline-installer/patches/casablanca.patch /tmp/oom-clone``
 
 Part 5. Creating offline installation package
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