github: Try to fix action naming

.github/workflows/build.yml

-name: Test build
+name: Simple test build
 on:
   - push
   - pull_request
-
 jobs:
   test:
     strategy:

.github/workflows/cifuzz.yml

----
-name: CIFuzz
+name: Fuzzing with OSS-fuzz
 on:
   push:
     branches:

.github/workflows/coverity.yml

-name: Coverity
+name: Coverity build and upload
 on:
   push:
     branches:
       - master
-
 jobs:
   test:
     runs-on: ubuntu-latest

.github/workflows/static-analysis.yml

@@ -2,7 +2,6 @@ name: Static analysis
 on:
   - push
   - pull_request
-
 jobs:
   test:
     runs-on: ubuntu-18.04