Fixing typo in CHANGELOG.md

Author: blnicho

CHANGELOG.md

@@ -26,7 +26,7 @@ Pyomo 6.9.0   (20 Feb 2025)
   - Pin Sphinx to not 8.2.0 (#3479)
   - Typos corrections (#3437, #3474)
   - Address intermittent TeeStream test failure (#3465)
-  - 2025 Testing update: Black 25.1.0, testing Qt withough X11 (#3463)
+  - 2025 Testing update: Black 25.1.0, testing Qt without X11 (#3463)
   - Testing: exclude Xpress 9.5.1 on Windows/GHA/Python3.{0,1} (#3455)
   - CY25 CI Infrastructure and typo fixes (#3453)
   - Verify we are testing all NEOS solvers (#3433)