Make it build with ghc-9.2

[erikd]

Need an SRP for servant-github-webhook because there has not been a new release to Hackage since 2019.

[dermetfan]

Should we not also update the GHC version in the nix build?

diff --git a/flake/packages.nix b/flake/packages.nix
index 867cd07..8d13e1e 100644
--- a/flake/packages.nix
+++ b/flake/packages.nix
@@ -16,11 +16,11 @@
         overlays = [
           inputs.haskellNix.overlay
           (final: prev: {
             github-hydra-bridge = final.haskell-nix.project' {
               src = ../github-hydra-bridge;
-              compiler-nix-name = "ghc8107";
+              compiler-nix-name = "ghc927";
             };
             hydra-github-bridge = final.haskell-nix.project' {
               src = ../hydra-github-bridge;
               compiler-nix-name = "ghc927";
             };

[dermetfan]

@erikd ⚠ rebased and force-pushed to have Hydra report required statuses