Update heroku/buildpacks-python to v1.0.0

## heroku/python

### Removed

- Removed support for the deprecated `runtime.txt` file. Python versions must now be specified using a `.python-version` file instead. ([#352](heroku/buildpacks-python#352))
- Removed support for Ubuntu 20.04 (and thus Heroku-20 / `heroku/builder:20`). ([#358](heroku/buildpacks-python#358))

### Changed

- Improved the error messages shown when `.python-version` contains an invalid Python version or stray invisible characters (such as ASCII control codes). ([#353](heroku/buildpacks-python#353) and [#354](heroku/buildpacks-python#354))
- Improved the error messages shown if I/O errors occur. ([#355](heroku/buildpacks-python#355) and [#356](heroku/buildpacks-python#356))

Author: heroku-linguist[bot]

builder-20/builder.toml

@@ -43,7 +43,7 @@ version = "0.20.8"
 
 [[buildpacks]]
   id = "heroku/python"
-  uri = "docker://docker.io/heroku/buildpack-python@sha256:4054a84d88d9a37d3798df5e7e33ea4d817d54fd56a8806a493bc47588ef24d6"
+  uri = "docker://docker.io/heroku/buildpack-python@sha256:c74c82e5b0bd94117370c71352a6ae93f293e8a3d75531b983126c0ecbd2f691"
 
 [[buildpacks]]
   id = "heroku/ruby"
@@ -59,7 +59,7 @@ version = "0.20.8"
     version = "2.0.0"
   [[order.group]]
     id = "heroku/python"
-    version = "0.26.1"
+    version = "1.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "4.2.1"

builder-22/builder.toml

@@ -47,7 +47,7 @@ version = "0.20.8"
 
 [[buildpacks]]
   id = "heroku/python"
-  uri = "docker://docker.io/heroku/buildpack-python@sha256:4054a84d88d9a37d3798df5e7e33ea4d817d54fd56a8806a493bc47588ef24d6"
+  uri = "docker://docker.io/heroku/buildpack-python@sha256:c74c82e5b0bd94117370c71352a6ae93f293e8a3d75531b983126c0ecbd2f691"
 
 [[buildpacks]]
   id = "heroku/ruby"
@@ -64,7 +64,7 @@ version = "0.20.8"
     optional = true
   [[order.group]]
     id = "heroku/python"
-    version = "0.26.1"
+    version = "1.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "4.2.1"

builder-24/builder.toml

@@ -47,7 +47,7 @@ mirrors = ["public.ecr.aws/heroku/heroku:24"]
 
 [[buildpacks]]
   id = "heroku/python"
-  uri = "docker://docker.io/heroku/buildpack-python@sha256:4054a84d88d9a37d3798df5e7e33ea4d817d54fd56a8806a493bc47588ef24d6"
+  uri = "docker://docker.io/heroku/buildpack-python@sha256:c74c82e5b0bd94117370c71352a6ae93f293e8a3d75531b983126c0ecbd2f691"
 
 [[buildpacks]]
   id = "heroku/ruby"
@@ -64,7 +64,7 @@ mirrors = ["public.ecr.aws/heroku/heroku:24"]
     optional = true
   [[order.group]]
     id = "heroku/python"
-    version = "0.26.1"
+    version = "1.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "4.2.1"