unpin nightly in CI (#23088)

Reverts #22927, bug has been fixed in nightly

Author: mockersf

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ env:
   CARGO_PROFILE_TEST_DEBUG: 0
   CARGO_PROFILE_DEV_DEBUG: 0
   # If nightly is breaking CI, modify this variable to target a specific nightly version.
-  NIGHTLY_TOOLCHAIN: "nightly-2026-02-11"
+  NIGHTLY_TOOLCHAIN: nightly
   RUSTFLAGS: "-D warnings"
 
 concurrency:

.github/workflows/docs.yml

@@ -11,7 +11,7 @@ env:
   CARGO_TERM_COLOR: always
   RUSTDOCFLAGS: --html-in-header header.html
   # If nightly is breaking CI, modify this variable to target a specific nightly version.
-  NIGHTLY_TOOLCHAIN: "nightly-2026-02-11"
+  NIGHTLY_TOOLCHAIN: nightly
 
 # Sets the permissions to allow deploying to Github pages.
 permissions:

.github/workflows/update-caches.yml

@@ -20,7 +20,7 @@ env:
   CARGO_PROFILE_TEST_DEBUG: 0
   CARGO_PROFILE_DEV_DEBUG: 0
   # If nightly is breaking CI, modify this variable to target a specific nightly version.
-  NIGHTLY_TOOLCHAIN: "nightly-2026-02-11"
+  NIGHTLY_TOOLCHAIN: nightly
 
 jobs:
   env:

.github/workflows/validation-jobs.yml

@@ -21,7 +21,7 @@ env:
   CARGO_PROFILE_TEST_DEBUG: 0
   CARGO_PROFILE_DEV_DEBUG: 0
   # If nightly is breaking CI, modify this variable to target a specific nightly version.
-  NIGHTLY_TOOLCHAIN: "nightly-2026-02-11"
+  NIGHTLY_TOOLCHAIN: nightly
 
 jobs:
   build-and-install-on-iOS: