chore: Allow dbt-core 1.11.6 (#1322)

### Description

We recently released dbt-core 1.11.6. This PR bumps the upper bound of
the dbt spec to `<1.11.7` to allow for the new release

### Checklist

- [ ] I have run this code in development and it appears to resolve the
stated issue
- [X] This PR includes tests, or tests are not required/relevant for
this PR
- [X] I have updated the `CHANGELOG.md` and added information about my
change to the "dbt-databricks next" section.

Author: QMalcolm

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 - Fix foreign-key on an incremental table to a primary key on a non-incremental table being lost after incremental run
 
+### Under the Hood
+
+- Allow for dbt-core 1.11.6
+
 ## dbt-databricks 1.11.4 (Jan 12, 2026)
 
 ### Features

pyproject.toml

@@ -27,7 +27,7 @@ dependencies = [
     "databricks-sql-connector[pyarrow]>=4.1.1, <4.1.4",
     "dbt-adapters>=1.22.0, <1.23.0",
     "dbt-common>=1.37.0, <1.38.0",
-    "dbt-core>=1.11.2, <1.11.3",
+    "dbt-core>=1.11.2, <1.11.7",
     "dbt-spark>=1.10.0, <1.11.0",
     "keyring>=23.13.0, <25.6.0",
     "pydantic>=1.10.0, <2.13.0",