[TASK] Fix filename for zip file

Makefile

@@ -32,4 +32,4 @@ vendor: composer.json composer.lock
 
 .PHONY: zip
 zip:
-	grep -Po "(?<='version' => ')([0-9]+\.[0-9]+\.[0-9]+)" ext_emconf.php | xargs -I {version} sh -c 'mkdir -p ../zip; git archive -v -o "../zip/${PWD##*/}_{version}.zip" v{version}'
+	grep -Po "(?<='version' => ')([0-9]+\.[0-9]+\.[0-9]+)" ext_emconf.php | xargs -I {version} sh -c 'mkdir -p ../zip; git archive -v -o "../zip/$(shell basename $(CURDIR))_{version}.zip" v{version}'