Fix the links found in the Report from dev build broken links output:

Broken URL (404): 'https://www.hilscher.com/netx/introduction/' from

qtdc-supported-platforms.html

Broken URL (404): 'https://www.intrinsyc.com/vertical-development-platforms/s820am-v2-automotive-development-platform/' from

qtdc-supported-platforms.html

Broken URL (404): 'https://www.technexion.com/products/system-on-modules/pico/pico-compute-modules/detail/PICOIMX7' from

qtdc-supported-platforms.html

Read timeout for 'http://www.ti.com/tool/TMDSSK3358' (timeout = 8s) from

qtdc-supported-platforms.html

updated 22:06:2021

some  of these are false warnings, and don't appear to be broken

File not found: '/archives/index.html' from

qtdc-index.html

File not found: '/qtautomotivesuite/' from

qt5-sidebar.html

Broken URL (500): 'https://www.toradex.com/computer-on-modules/colibri-arm-family/nxp-imx6ull' from

b2qt-preparing-hardware-toradex.html

Broken URL (500): 'https://developer.toradex.com/software/toradex-easy-installer' from

b2qt-preparing-hardware-toradex.html

Broken URL (500): 'https://developer.toradex.com/knowledge-base/device-tree-overlays-linux' from

b2qt-preparing-hardware-toradex.html

Failed to connect to 'https://mingw-w64.org/' from

b2qt-meta-qt6.html

Broken URL (404): 'https://www.intrinsyc.com/vertical-development-platforms/s820am-v2-automotive-development-platform/' from

qtdc-supported-platforms.html

Broken URL (404): 'https://www.hilscher.com/netx/introduction/' from

qtdc-supported-platforms.html

Broken URL (500): 'https://developer.toradex.com/products/apalis-som-family/modules/apalis-imx8' from

qtdc-supported-platforms.html

Broken URL (500): 'https://developer.toradex.com/products/colibri-imx6' from

qtdc-supported-platforms.html

Broken URL (500): 'https://www.toradex.com/computer-on-modules/colibri-arm-family/nxp-imx-8x' from

qtdc-supported-platforms.html

Broken URL (500): 'https://www.toradex.com/computer-on-modules/colibri-arm-family/nxp-freescale-vybrid-vf5xx' from

qtdc-supported-platforms.html

Broken URL (500): 'https://developer.toradex.com/products/colibri-vf61' from

qtdc-supported-platforms.html

Broken URL (404): 'https://www.technexion.com/products/system-on-modules/pico/pico-compute-modules/detail/PICOIMX7' from

qtdc-supported-platforms.html