Value highlighting does not correspond to YAML 1.2 specification

[marcelldls]

Describe the bug

With a YAML spec of 1.2 chosen in settings (Default) - the highlighting of values does not correspond to the 1.2 specification as some strings are being highlighted as if boolean. It appears that strings that corresponding to boolean from older specification are being highlighted

Expected Behavior

${{\color{lightskyblue}\Huge{\textsf{Stage:\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Axis1:\ }}}}$ ${{\color{darkorange}\Huge{\textsf{ X\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Axis2:\ }}}}$ ${{\color{darkorange}\Huge{\textsf{ Y\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Axis3:\ }}}}$ ${{\color{darkorange}\Huge{\textsf{ Z\ }}}}$

As per https://yaml.org/spec/1.2.2/

Current Behavior

${{\color{lightskyblue}\Huge{\textsf{Stage:\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Axis1:\ }}}}$ ${{\color{darkorange}\Huge{\textsf{ X\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Axis2:\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Y\ }}}}$ ${{\color{lightskyblue}\Huge{\textsf{ Axis3:\ }}}}$ ${{\color{darkorange}\Huge{\textsf{ Z\ }}}}$