docs: fix broken link

ChmielewskiKamil · web-flow · commit f7e6911e4d07 · 2023-01-31T12:39:47.000+01:00
There is no `exercises.md` file, only the `exercises` folder.
diff --git a/program-analysis/manticore/adding-constraints.md b/program-analysis/manticore/adding-constraints.md
@@ -121,4 +121,4 @@ if no_bug_found:
 
 All the code above you can find into the [examples/example_constraint.py](./examples/example_constraint.py)
 
-The next step is to follow the [exercises](./exercises.md).
+The next step is to follow the [exercises](./exercises).

Original file line number	Diff line number	Diff line change
`@@ -121,4 +121,4 @@ if no_bug_found:`
`121`	`121`
`122`	`122`	`All the code above you can find into the [examples/example_constraint.py](./examples/example_constraint.py)`
`123`	`123`
`124`		`-The next step is to follow the [exercises](./exercises.md).`
	`124`	`+The next step is to follow the [exercises](./exercises).`