Update go apidiff to v0.1.0

Author: Cecile Robert-Michon

Makefile

@@ -85,7 +85,7 @@ RELEASE_NOTES_VER := v0.9.0
 RELEASE_NOTES_BIN := release-notes
 RELEASE_NOTES := $(TOOLS_BIN_DIR)/$(RELEASE_NOTES_BIN)-$(RELEASE_NOTES_VER)
 
-GO_APIDIFF_VER := latest
+GO_APIDIFF_VER := v0.1.0
 GO_APIDIFF_BIN := go-apidiff
 GO_APIDIFF := $(TOOLS_BIN_DIR)/$(GO_APIDIFF_BIN)