Bump wpilib to 2026 beta (#2192)

## Description

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the "how") -->

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well. If this touches platform-specific behavior, this is where test
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Bump to wpilib 2026 beta. This does not bump our pythonlib, as robotpy
hasn't come out yet.

## Meta

Merge checklist:
- [ ] Pull Request title is [short, imperative
summary](https://cbea.ms/git-commit/) of proposed changes
- [ ] The description documents the _what_ and _why_
- [ ] This PR has been
[linted](https://docs.photonvision.org/en/latest/docs/contributing/linting.html).
- [ ] If this PR changes behavior or adds a feature, user documentation
is updated
- [ ] If this PR touches photon-serde, all messages have been
regenerated and hashes have not changed unexpectedly
- [ ] If this PR touches configuration, this is backwards compatible
with settings back to v2025.3.2
- [ ] If this PR touches pipeline settings or anything related to data
exchange, the frontend typing is updated
- [ ] If this PR addresses a bug, a regression test for it is added

---------

Co-authored-by: Gold856 <117957790+Gold856@users.noreply.github.com>

photonlib-cpp-examples/poseest/build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id "cpp"
     id "google-test-test-suite"
-    id "edu.wpi.first.GradleRIO" version "2025.3.2"
+    id "edu.wpi.first.GradleRIO" version "2026.1.1-beta-1"
 }
 
 repositories {
@@ -11,8 +11,8 @@ repositories {
 
 wpi.maven.useLocal = false
 wpi.maven.useDevelopment = false
-wpi.versions.wpilibVersion = "2025.3.2"
-wpi.versions.wpimathVersion = "2025.3.2"
+wpi.versions.wpilibVersion = "2026.1.1-beta-1"
+wpi.versions.wpimathVersion = "2026.1.1-beta-1"
 
 // Define my targets (RoboRIO) and artifacts (deployable files)
 // This is added by GradleRIO's backing project DeployUtils.