Fixed workflow names

Author: ladal1

.github/workflows/run_tests(36).yml

@@ -1,4 +1,4 @@
-name: Run tests
+name: Run tests (3.6)
 
 on:
   push:

.github/workflows/run_tests(38).yml

@@ -1,4 +1,4 @@
-name: Run tests
+name: Run tests (3.8)
 
 on:
   push:

.github/workflows/run_tests(39).yml

@@ -1,4 +1,4 @@
-name: Run tests
+name: Run tests (3.9)
 
 on:
   push:

.github/workflows/run_tests.yml

@@ -1,4 +1,4 @@
-name: Run tests
+name: Run tests (3.7)
 
 on:
   push: