Remove usages of apt for apt-get

Author: nhooyr

ci/lint/Dockerfile

@@ -5,7 +5,7 @@ LABEL "com.github.actions.description"=""
 LABEL "com.github.actions.icon"="code"
 LABEL "com.github.actions.color"="purple"
 
-RUN apt update && apt install -y shellcheck
+RUN apt-get update && apt-get install -y shellcheck
 
 COPY entrypoint.sh /entrypoint.sh
 

ci/test/Dockerfile

@@ -5,8 +5,8 @@ LABEL "com.github.actions.description"=""
 LABEL "com.github.actions.icon"="code"
 LABEL "com.github.actions.color"="green"
 
-RUN apt update && \
-	apt install -y python-pip && \
+RUN apt-get update && \
+	apt-get install -y python-pip && \
 	pip install autobahntestsuite
 
 COPY entrypoint.sh /entrypoint.sh