Add date filters to tech report

[tunetheweb]

Fixes #1126 for @alonkochba

[github-actions]

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EDITORCONFIG	Pass ✅
HTML	Fail ❌
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JSON	Pass ✅
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PYTHON_FLAKE8	Pass ✅

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HTML

   Config loaded: /github/workspace/.github/linters/.htmlhintrc

   Config loaded: /github/workspace/.github/linters/.htmlhintrc

   /github/workspace/templates/techreport/templates/filters.html
�[37m      L61 |�[90m...     <option value="{{ d.value }}" {% if d.value==tech_report_page.filters.start %}selected{% endif %...�[39m
�[37m                                                      ^ �[31mThe value of attribute [ d.value ] must be in double quotes. (attr-value-double-quotes)�[39m
�[37m      L76 |�[90m...     <option value="{{ d.value }}" {% if d.value==tech_report_page.filters.end %}selected{% endif %}>�[39m
�[37m                                                      ^ �[31mThe value of attribute [ d.value ] must be in double quotes. (attr-value-double-quotes)�[39m

Scanned 2 files, found 2 errors in 1 files (37 ms)

[github-actions]

Super-linter summary

Language	Validation result
CSS	Pass ✅
EDITORCONFIG	Pass ✅
HTML	Pass ✅
JAVASCRIPT_ES	Pass ✅
JSON	Pass ✅
PYTHON_BLACK	Pass ✅
PYTHON_PYLINT	Pass ✅
PYTHON_FLAKE8	Pass ✅

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