Release ansys-sphinx-theme v1.5

[jorgepiloto]

• fix: smaller screen view and search for mobile views #689
• feat: add multi index searching and filtering #674
• feat: small layout adjustments #691
• fix: style for back to top button #693
• feat: small layout adjustments #691
• feat: add metatag content #680
• fix: block snowbalstemmer <3 for now #686