Fix shebangs

.github/scripts/install-bionic.sh

@@ -1,4 +1,4 @@
-#/bin/bash
+#!/usr/bin/env bash
 
 # Adding repos and packages
 add-apt-repository -y ppa:libretime/libretime

.github/scripts/install-xenial.sh

@@ -1,4 +1,4 @@
-#/bin/bash
+#!/usr/bin/env bash
 
 # Adding repos and packages
 add-apt-repository -y ppa:libretime/libretime

.github/scripts/python-pkg-install.sh

@@ -1,8 +1,9 @@
-#/bin/bash
+#!/usr/bin/env bash
+
 echo "::group::Install Python apps"
 pip3 install nose mock
 
-for app in `ls python_apps`; do
+for app in $(ls python_apps); do
   pip3 install -e python_apps/$app
 done
 echo "::endgroup::"

.github/scripts/python-pkg-test.sh

@@ -1,4 +1,4 @@
-#/bin/bash
+#!/usr/bin/env bash
 
 failed='f'
 # Starting at repo root

.github/scripts/release.sh

@@ -1,4 +1,4 @@
-#/bin/bash
+#!/usr/bin/env bash
 
 #release.sh 1.8.2
 #creates a libretime folder with a "1.8.2" suffix