patch 9.0.1646: CI: codecov may take a very long time to run

Problem:    CI: codecov may take a very long time to run.
Solution:   Add a timeout. (Philip Heiduck, closes vim#12559)

Author: pheiduck

.github/workflows/ci.yml

@@ -238,6 +238,7 @@ jobs:
           find . -type f -name '*.gcno' -exec gcov -pb {} + || true
 
       - name: Codecov
+        timeout-minutes: 20
         if: matrix.coverage
         uses: codecov/codecov-action@v3
         with:
@@ -610,6 +611,7 @@ jobs:
           find . -type f -name '*.gcno' -exec gcov -pb {} + || true
 
       - name: Codecov
+        timeout-minutes: 20
         if: matrix.coverage
         uses: codecov/codecov-action@v3
         with:

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1646,
 /**/
     1645,
 /**/