Update to opus-HEAD-66611f1.

doc/opus_logo.svg

Index: doc/opus_logo.svg
diff --git a/doc/opus_logo.svg b/doc/opus_logo.svg
index 97112afda83bcbe237d03ed83f0112de557311c8..db2879efc26525fe771f8e37fb182f544cc54464 100644
--- a/doc/opus_logo.svg
+++ b/doc/opus_logo.svg
@@ -59,11 +59,11 @@
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@@ -76,11 +76,11 @@
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    x2="229.61819"
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@@ -93,11 +93,11 @@
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@@ -110,11 +110,11 @@
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@@ -127,11 +127,11 @@
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