Fix shebang breaking script on nixos

.sops/decrypt-filter.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+
 # Takes file path as first positional argument
 # Takes encrypted file contents from /dev/stdin
 # Outputs to stdout

.sops/encrypt-filter.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+
 # Takes file path as $1
 # Takes file contents from stdin
 # Outputs to stdout