Update names of Github workflows actions

.github/workflows/analyze.yml

@@ -1,4 +1,4 @@
-name: Analyze
+name: analyze
 
 on:
   push:

.github/workflows/lint.yml

@@ -1,4 +1,4 @@
-name: Lint
+name: lint
 
 on:
   push:

.github/workflows/test.yml → .github/workflows/tests.yml

@@ -1,4 +1,4 @@
-name: Test
+name: tests
 
 on:
   push:

README.md

@@ -1,8 +1,8 @@
 <h1 align="center">strutil</h1>
 
 <p align="center">
-    <a href="https://github.com/adrg/strutil/actions?query=workflow%3ACI">
-        <img alt="Build status" src="https://github.com/adrg/strutil/workflows/CI/badge.svg" />
+    <a href="https://github.com/adrg/strutil/actions/workflows/tests.yml">
+        <img alt="Tests status" src="https://github.com/adrg/strutil/actions/workflows/tests.yml/badge.svg">
     </a>
     <a href="https://codecov.io/gh/adrg/strutil">
         <img alt="Code coverage" src="https://codecov.io/gh/adrg/strutil/branch/master/graphs/badge.svg?branch=master" />