treewide: fix mismerge

pkgs/development/python-modules/calver/default.nix

@@ -43,7 +43,7 @@ let
     passthru.tests.calver = self.overridePythonAttrs { doCheck = true; };
 
     meta = {
-      changelog = "https://github.com/di/calver/releases/tag/${src.tag}";
+      changelog = "https://github.com/di/calver/releases/tag/${src.rev}";
       description = "Setuptools extension for CalVer package versions";
       homepage = "https://github.com/di/calver";
       license = lib.licenses.asl20;

pkgs/development/python-modules/hpack/default.nix

@@ -29,7 +29,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "hpack" ];
 
   meta = with lib; {
-    changelog = "https://github.com/python-hyper/hpack/blob/${src.tag}/CHANGELOG.rst";
+    changelog = "https://github.com/python-hyper/hpack/blob/${src.rev}/CHANGELOG.rst";
     description = "Pure-Python HPACK header compression";
     homepage = "https://github.com/python-hyper/hpack";
     license = licenses.mit;

pkgs/development/python-modules/pyflakes/default.nix

@@ -34,7 +34,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     homepage = "https://github.com/PyCQA/pyflakes";
-    changelog = "https://github.com/PyCQA/pyflakes/blob/${src.tag}/NEWS.rst";
+    changelog = "https://github.com/PyCQA/pyflakes/blob/${src.rev}/NEWS.rst";
     description = "Simple program which checks Python source files for errors";
     mainProgram = "pyflakes";
     license = licenses.mit;

pkgs/development/python-modules/tomli-w/default.nix

@@ -31,7 +31,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Write-only counterpart to Tomli, which is a read-only TOML parser";
     homepage = "https://github.com/hukkin/tomli-w";
-    changelog = "https://github.com/hukkin/tomli-w/blob/${src.tag}/CHANGELOG.md";
+    changelog = "https://github.com/hukkin/tomli-w/blob/${src.rev}/CHANGELOG.md";
     license = licenses.mit;
     maintainers = with maintainers; [ lovesegfault ];
   };