M #-: Avoid Unicode Minus (U+2212)

Author: Vlastimil Holer

source/intro_release_notes/release_notes/whats_new.rst

@@ -24,7 +24,7 @@ OpenNebula 5.10 (Boomerang) is the sixth major release of the OpenNebula 5 serie
     :width: 90%
     :align: center
 
-As usual, OpenNebula 5.10 codename refers to a nebula, in this case the `Boomerang Nebula <https://en.wikipedia.org/wiki/Boomerang_Nebula>`__, a protoplanetary nebula located 5,000 light-years away from Earth in the constellation Centaurus. It is also known as the Bow Tie Nebula and catalogued as LEDA 3074547. The nebula's temperature is measured at 1 K (−272.15 °C; −457.87 °F) making it the coolest natural place currently known in the Universe. Same as OpenNebula in the IaaS space :)
+As usual, OpenNebula 5.10 codename refers to a nebula, in this case the `Boomerang Nebula <https://en.wikipedia.org/wiki/Boomerang_Nebula>`__, a protoplanetary nebula located 5,000 light-years away from Earth in the constellation Centaurus. It is also known as the Bow Tie Nebula and catalogued as LEDA 3074547. The nebula's temperature is measured at 1 K (-272.15 °C; -457.87 °F) making it the coolest natural place currently known in the Universe. Same as OpenNebula in the IaaS space :)
 
 The OpenNebula team is now transitioning to "bug-fixing mode". Note that this is a first beta release aimed at testers and developers to try the new features, and send a more than welcomed feedback for the final release. Also note that being a beta, there is no migration path from the previous stable version (5.8.5) nor migration path to the final stable version (5.10.0). A list of open issues can be found in the `GitHub development portal <https://github.com/OpenNebula/one/milestone/23>`__.