bump MSRV to 1.76.0

there's really no point in trying to stay as low as possible for us,
and this makes development easier. Debian users should just use rustup,
Nix users already get the proper toolchains.

Signed-off-by: strawberry <strawberry@puppygock.gay>

Cargo.toml

@@ -14,7 +14,7 @@ version = "0.3.0"
 edition = "2021"
 
 # See also `rust-toolchain.toml`
-rust-version = "1.75.0"
+rust-version = "1.76.0"
 
 
 [dependencies]

flake.nix

@@ -21,7 +21,7 @@
         file = ./rust-toolchain.toml;
 
         # See also `rust-toolchain.toml`
-        sha256 = "sha256-SXRtAuO4IqNOQq+nLbrsDFbVk+3aVA8NNpSZsKlVH/8=";
+        sha256 = "sha256-e4mlaJehWBymYxJGgnbuCObVlqMlQSilZ8FljG9zPHY=";
       };
 
       scope = pkgs: pkgs.lib.makeScope pkgs.newScope (self: {

rust-toolchain.toml

@@ -11,7 +11,7 @@
 # If you're having trouble making the relevant changes, bug a maintainer.
 
 [toolchain]
-channel = "1.75.0"
+channel = "1.76.0"
 components = [
     # For rust-analyzer
     "rust-src",
@@ -20,4 +20,4 @@ targets = [
     "x86_64-unknown-linux-gnu",
     "x86_64-unknown-linux-musl",
     "aarch64-unknown-linux-musl",
-]
+]