feat: change MSRV from 1.78 to 1.80.1 (#3279)

I'm going to leave this as a non-breaking change since that seems to be
the consensus in the community from what I can gather. That being said,
this being a non-breaking change in downstream libraries is what caused
this in the first place 😖

.github/workflows/rust.yml

@@ -199,7 +199,7 @@ jobs:
     runs-on: ubuntu-24.04
     strategy:
       matrix:
-        msrv: ["1.78.0"] # This should match up with rust-version in Cargo.toml
+        msrv: ["1.80.1"] # This should match up with rust-version in Cargo.toml
     env:
       # Need up-to-date compilers for kernels
       CC: clang

Cargo.toml

@@ -41,7 +41,7 @@ categories = [
     "development-tools",
     "science",
 ]
-rust-version = "1.78"
+rust-version = "1.80.1"
 
 [workspace.dependencies]
 lance = { version = "=0.21.0", path = "./rust/lance" }