Update Comskip repository link

git:// protocol is no longer supported, replaced with https://

Author: ZackaryH8

Dockerfile

@@ -7,7 +7,7 @@ RUN apk --no-cache add python ffmpeg tzdata bash \
 && wget http://prdownloads.sourceforge.net/argtable/argtable2-13.tar.gz \
 && tar xzf argtable2-13.tar.gz \
 && cd argtable2-13/ && ./configure && make && make install \
-&& cd /tmp && git clone git://github.com/erikkaashoek/Comskip.git \
+&& cd /tmp && git clone https://github.com/erikkaashoek/Comskip \
 && cd Comskip && ./autogen.sh && ./configure && make && make install \
 && apk del builddeps \
 && rm -rf /var/cache/apk/* /tmp/* /tmp/.[!.]*