treewide: fix redirected urls

According to https://repology.org/repository/nix_unstable/problems, we have a
lot of packages that have http links that redirect to https as their homepage.
This commit updates all these packages to use the https links as their
homepage.

The following script was used to make these updates:

```

curl https://repology.org/api/v1/repository/nix_unstable/problems \
    | jq '.[] | .problem' -r \
    | rg 'Homepage link "(.+)" is a permanent redirect to "(.+)" and should be updated' --replace 's@$1@$2@' \
    | sort | uniq > script.sed

find -name '*.nix' | xargs -P4 -- sed -f script.sed -i
```

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/development/interpreters/racket/default.nix b/pkgs/development/interpreters/racket/default.nix
index 3b3b91afd6f..f12d1f1090f 100644
--- a/pkgs/development/interpreters/racket/default.nix
+++ b/pkgs/development/interpreters/racket/default.nix
@@ -102,7 +102,7 @@ stdenv.mkDerivation rec {
       libraries support applications from web servers and databases to
       GUIs and charts.
     '';
-    homepage = http://racket-lang.org/;
+    homepage = https://racket-lang.org/;
     license = with licenses; [ asl20 /* or */ mit ];
     maintainers = with maintainers; [ kkallio henrytill vrthra ];
     platforms = [ "x86_64-darwin" "x86_64-linux" ];