treewide: replace base64 encoded hashes

pkgs/tools/graphics/gmic/default.nix

@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://gmic.eu/files/source/gmic_${version}.tar.gz";
-    sha256 = "YjNpX5snmZ3MfMOqdICw8ZK9RN6FIJCRo7S4plroxLU=";
+    sha256 = "1df4x1dadf5llf8r0845vr2bv4pin2079an3gk69v697kdgnjcv2";
   };
 
   nativeBuildInputs = [

pkgs/tools/graphics/netpbm/default.nix

@@ -24,7 +24,7 @@ stdenv.mkDerivation {
   src = fetchsvn {
     url = "https://svn.code.sf.net/p/netpbm/code/advanced";
     rev = "3735";
-    sha256 = "hRepEUBlf83p77Amjze+Qz7XTHhCuPdV01K/UabR89Q=";
+    sha256 = "1m7ks6k53gsjsdazgf22g16dfgj3pqvqy9mhxzlwszv5808sj5w5";
   };
 
   postPatch = ''

pkgs/tools/graphics/shotgun/default.nix

@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
     owner = "neXromancers";
     repo = pname;
     rev = "v${version}";
-    sha256 = "tJnF1X+NI1hP0J/n3rGy8TD/yIveqRPVlJvJvn0C7Do=";
+    sha256 = "0fpc09yvxjcvjkai7afyig4gyc7inaqxxrwzs17mh8wdgzawb6dl";
   };
 
   cargoSha256 = "0sbhij8qh9n05nzhp47dm46hbc59awar515f9nhd3wvahwz53zam";