change echo statement

Author: lia-viam

.github/workflows/conan.yml

@@ -210,7 +210,9 @@ jobs:
           conan profile detect
 
           mkdir b2-tmp
-          echo "[requires]\nb2/5.3.2\n" > b2-tmp/conanfile.txt
+          echo '[requires]
+          b2/5.3.2
+          ' > b2-tmp/conanfile.txt
           cat b2-tmp/conanfile.txt
           conan install b2-tmp --build=b2/5.3.2 -s compiler.cppstd=14 -s:a compiler.cppstd=14
           rm -r b2-tmp