docs: fix typos (contraint, funciton, priorty) in docstrings (#1808)

Co-authored-by: Bojun Chai <bojunchai@microsoft.com>

Author: Bojun-Vvibe

alembic/op.pyi

@@ -86,7 +86,7 @@ def add_column(
 
     .. note::
 
-        Not all contraint types may be indicated with this directive.
+        Not all constraint types may be indicated with this directive.
         NOT NULL, FOREIGN KEY, and CHECK are honored, PRIMARY KEY
         is conditionally honored, UNIQUE
         is currently not.

alembic/operations/base.py

@@ -652,7 +652,7 @@ def add_column(
 
             .. note::
 
-                Not all contraint types may be indicated with this directive.
+                Not all constraint types may be indicated with this directive.
                 NOT NULL, FOREIGN KEY, and CHECK are honored, PRIMARY KEY
                 is conditionally honored, UNIQUE
                 is currently not.

alembic/operations/ops.py

@@ -2123,7 +2123,7 @@ def add_column(
 
         .. note::
 
-            Not all contraint types may be indicated with this directive.
+            Not all constraint types may be indicated with this directive.
             NOT NULL, FOREIGN KEY, and CHECK are honored, PRIMARY KEY
             is conditionally honored, UNIQUE
             is currently not.

alembic/util/langhelpers.py

@@ -292,7 +292,7 @@ class DispatchPriority(enum.IntEnum):
     """
 
     FIRST = 50
-    """Run the funciton in the first batch of functions (highest priority)"""
+    """Run the function in the first batch of functions (highest priority)"""
 
     MEDIUM = 25
     """Run the function at normal priority (this is the default)"""
@@ -354,7 +354,7 @@ def branch(self) -> Dispatcher:
 
 
 class PriorityDispatcher:
-    """registers lists of functions at multiple levels of priorty and provides
+    """registers lists of functions at multiple levels of priority and provides
     a target to invoke them in priority order.
 
     .. versionadded:: 1.18.0 - PriorityDispatcher replaces the job