Minor readme link fixes (#431)

* minor readme link fixes

* changelog addition

Co-authored-by: Joel Labes <joel.labes@dbtlabs.com>

CHANGELOG.md

@@ -1,3 +1,6 @@
+# dbt-utils Next
+- Url link fixes within the README for `not_constant`, `dateadd`, `datediff` and updated the header `Logger` to `Jinja Helpers`.
+
 # dbt-utils v0.7.3
 
 ## Under the hood
@@ -14,8 +17,6 @@
 
 
 ## Under the hood
-
-
 - Allow user to provide any case type when defining the `exclude` argument in `dbt_utils.star()` ([#403](https://github.com/dbt-labs/dbt-utils/pull/403))
 - Log whole row instead of just column name in 'accepted_range' schema test to allow better visibility into failures ([#413](https://github.com/dbt-labs/dbt-utils/pull/413))
 - Use column name to group in 'get_column_values ' to allow better cross db functionality ([#407](https://github.com/dbt-labs/dbt-utils/pull/407))
@@ -27,7 +28,6 @@
 - Declare compatibility with dbt v0.21.0, which has no breaking changes for this package ([#398](https://github.com/fishtown-analytics/dbt-utils/pull/398))
 
 
-
 # dbt-utils v0.7.0
 ## Breaking changes
 

README.md

@@ -12,7 +12,7 @@ Check [dbt Hub](https://hub.getdbt.com/dbt-labs/dbt_utils/latest/) for the lates
   - [expression_is_true](#expression_is_true-source)
   - [recency](#recency-source)
   - [at_least_one](#at_least_one-source)
-  - [not_constant](#not_constant)
+  - [not_constant](#not_constant-source)
   - [cardinality_equality](#cardinality_equality-source)
   - [unique_where](#unique_where-source)
   - [not_null_where](#not_null_where-source)
@@ -48,13 +48,13 @@ Check [dbt Hub](https://hub.getdbt.com/dbt-labs/dbt_utils/latest/) for the lates
 
 - [Cross-database macros](#cross-database-macros):
     - [current_timestamp](#current_timestamp-source)
-    - [dateadd](#date_add-source)
-    - [datediff](#datadiff-source)
+    - [dateadd](#dateadd-source)
+    - [datediff](#datediff-source)
     - [split_part](#split_part-source)
     - [last_day](#last_day-source)
     - [width_bucket](#width_bucket-source)
 
-- [Logger](#logger)
+- [Jinja Helpers](#jinja-helpers)
     - [pretty_time](#pretty_time-source)
     - [pretty_log_format](#pretty_log_format-source)
     - [log_info](#log_info-source)