Update glam requirement from 0.25 to 0.26

Updates the requirements on [glam](https://github.com/bitshifter/glam-rs) to permit the latest version.
- [Changelog](https://github.com/bitshifter/glam-rs/blob/main/CHANGELOG.md)
- [Commits](bitshifter/glam-rs@0.25.0...0.26.0)

---
updated-dependencies:
- dependency-name: glam
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

gdnative-core/Cargo.toml

@@ -25,7 +25,7 @@ ahash = "0.8"
 approx = "0.5"
 atomic-take = "1"
 bitflags = "1"
-glam = "0.25"
+glam = "0.26"
 indexmap = "2"
 inventory = { version = "0.3", optional = true }
 libc = "0.2"